TRANS'UIISSION, AUTOMATIC 8A...TRANS'UIISSION, AUTOMATIC TRANSMISSION 8A_1 AUTOMATIC 8A INDEX...

$: TRANS'UIISSION, AUTOMATIC 8A...TRANS'UIISSION, AUTOMATIC TRANSMISSION 8A_1 AUTOMATIC 8A INDEX ALUMTNUM powERGLTDE ..... ri1n;.--D.-:rli!tl9n ..... 8A-2 MAINTENANCE AND ADJUSTI\4ENTS$
TRANS'UIISSION,

AUTOMATIC TRANSMISSION 8A_1

AUTOMATIC 8A

INDEX

ALUMTNUM powERGLTDE ..... ri1n;.--D.-:rli!tl9n ........ 8A-2MAINTENANCE AND ADJUSTI\4ENTS ...... SN J

Oil level and requirements ........... 8A 2Drainingandrefilling ......... 8A_2Senice adjustments .......... 8A 2Linkage adjustment ..........8A 3Powerglide control lever and bracket_assembly .........8A 3

__ Thro le vaive linkdge adjuslmenr . . . . bA .JpowERGLlDE rnaruSuts'storl ... u{ JReplacement .......8A 3Bolt torgue ........8A 4Diagnosis . ........8A 4Warming up transmission ... gA 4Shop warm up ......8A-4Road warm up ..._..8A 4Checking fluid tevel .......... uA 4

__Bdsic pressurechecks .... ..... bA 4TRANSMISSTON OVEBHAUL OpERATTONS . . 8A {,Disassembly ....... iiA 6I xtensions, governor and rear orl pump S q oI rdn\Trsston rnlernal ,romponent5,, ,... . gC gUlpdnrnd\ajvebody ...._

oVERHAUL uNtr AssirvtBliii .:..... . s;'r0__aonv(lorrld\tatot ,,,.., \A l0FRONTPUMP ....... dq t0

Seal replacement ... 8A_i0Disassembly ......6A l0Inspection .......8A I0Assembly .......8,.\-roRearpump .......8A 12

^..l9u,r!u-p bushing replacement ......... 8A 12CLUTCHDRUM .....84-12Disassembly ......8A 12Inspectior .......8A_13Bushingreplacement ......... 8A 13Assembly. ....... 8A 13_ Low band ........ 8A 1zlPLANET ASSEMBLY AND INPUT SHAFT . . . 8A 14Iispection . ......8A_i4

Repairs .. ....... SA_ 14

^^Small planet callier assembly_overhaul .... gA-14

GOVERNOR .......8A 15ljr\a.senbly ...... gA loInsprirron ...... dA IbA'sem hl\

vA-LVEBobi . . ... . .... .:... ;i i;Rernoval .. ....... gA 17Dtsa\cn-bly ...... dA 17r.nspe.tron . . .... pc 17Assembly . ....... 6,4-17

...1n\ralldtron ....... UA 17VACUUI\4MODULATOR ....Removal .. .......8A_17Inspectionand repaias ....... _. IJA 17

--I-n:i111,t19" ....... riA 17TRANSTV SSTON CASE ..... ... 8A l?

InsoectronKeor busfung replacemen t

TRANSMISSIONEXTENSION ..,.In.pe( tionRear bushing replacement

TRANSMTSSTON. .... ..Assembly.Transmj5rion lnlernal componenls , . .Frlenrlon go!ernor and rear o pumpOil pan and valve body . . .Lou band adiuilmentThrottle valve adjustment

TURBO HYDRA.MATIC400TRANSM|SS|ON ......

DescriDtionDETENTSWITCH ..,,.,....

4dtlrstmenlp o\edure\ .. ..... :..Transmission fluidFluidcheckingproceO** .... ......Fluid lever indicator\eLtral ra te ly swtlLh adtustmenr

^__ujr-rntnganJ rerrlling lr.in\mission . . . . .

PRESSU R E REGULATbR VALVERentovdl .. ..........lnstallation.....-.

CONTROL VALVE BODY .,... ,..:.Remo\dl . .

lnstallationGOVERNOR .. ...............:

Removal .

lnsraJlationMODULATOR eruo rvroournron vaLvi

Removal ..lrr.t3 t121i,,n

PARKINGLINKAGE ............., :Removal . ,

InstxllarionREARSEAL ,.. ...,.,

Kemo\, a I

lnstallation ... .TRANSMISSION FEPLACEMENT'

' ' ' ' ''TURBO HYDBA-MATIC 4OODIAGNOSISPROCEDURE ..,..

Orl level and Londit,on check .... . . ...l\,lanLral linkageOrl lea k\ . .

ros\lDte nolnt\ ol oil leak\ . ,

Lase porosj ty refalr .

OIL PRESSURE CHECKWith crf sraLion,rv

vAcuutvl MoDULAiOn . .....:.....Assernbly.Vacuum diaphragml""k"h".k . . . .. . :.Atmospheric leak check ......^Bello*.cenp21;...cte.f ...... -... .blceve allpnmcnt clreckPrrssure swrtch eleck

FLOOR SHIFT CABLE . . .... . .......

Page.... 8A 17....8A_17. . . . 8A 17.... 8A l7. .. . 8A 17.... 8A t9....8A-19....8A_19....8A 20. .. . 8A_21....8A 2l. .. . 8A 21

.... 8A_22

....8A 22

....8A-22

....8A 22

....8A-22...8A 22. . . 84.-23...8A 23...8A 23...8A 23...8A 23...8A 23...8A-23...8A 23. . . 8A_23...8A 23...8A 23...8A 23.. 8A 23

...8A 23

...8A 23

..,8A 23

. . . 84_23

...8A 24

...8A 24

...84 2.4

. . . 8A-24

. . . 8A- 24

. . . 8A.-24

...8A 24. . 8A_24.. 8A 24.. 8A 24. . 84-24.. 8A 25. . 8A_25.. 8A 25.. 8A 25.. 8A 25.. 8A 25..8A-26.. 8A 26.. 8A 26.. EA 76

AUTOMATICTRANSMISSION 8A_2

ALUMINUM POWERGLIDEDescriptionThe case and converter housing ol the two speedaluminLlm Powerglide Transmission is a single case aluminu unit. When the nanual control is placed in the driveposition, the transmission automatically shifts to low gear

for initial vehicle movement. As the car gains speed anddepending on load and throttle position, an automaticshift is nade to high gear. A lorced down-shift featureprovides a passing gear by retuming the transmission tolow range,

The front pump assembly is a conventional gear type andthe oil pump housing is of the large diameter type actingas the front bulkhead of the transmission. The conven'tional gear type rear oil pump is bolted outside the rearbutkhead of the case and is completely enclosed by theone piece aluminum extenslon housing. The torqueconverter is a conventional three element welded designbolted to the engine flywheel which drives through a

two-speed planetary gearset. The high clutch assembly is

typical of the designs used in this type transmission.

The aluminum Powerglide uscs an output shaft mountedgovemor which requires a hole through the output shaft.The reverse clutch assenrbly is a multiple disc type clutchThe steel plates are splined directly to the case while theface plates are splined to the internal or ring gear. Theclutch piston operates within the rear portion of the case.

The internal diameter of the piston is sealed to an integralhub portjon of the case rear bulkhead. The outsidediameter is sealed to a machined portion of the case. Thepiston is hydraulically applied and is released by sepalatecoil springs. The valve body assembly is bolted to thebottom of the transmission case alrd is accessible forservice by ienoving the oil pan assembly. The valve bodyconsists of an upper and Iower body located on either sideof a transfer plate. The vacuum modulator is located onthe left rear face of the transmission case. The mod[latorvalve bore is located in the upper vaive body.

MAINTENANCE AND ADJUSTIVIE NTSOil level and requirementsThe transmission oil level should be checked periodically.Oil should be added only when level is near the "ADD"maik on the dip stick with oil hot or at opetatingtemperature. The oil level dip stick is located at the rightiear of the engine compartment. In order to check oillevel accurately, the engine should be idled with thetmnsmission oil hot and the control lever in neutral (N)position.

It is important that the oil leve1 be maintained no higherthan the "FULL" mark on the transnlission oil Ievelgauge. DO NOT OVERFILL, for when the oil level is atthe fuil mark on the dip stick, it is just slightly below theplanetary gear unit. If additional oil is added, bdnging theoil level above the ful1 mark, the planetary unit wiII run inthe oil, foaming and aerating the oil. This aemted oilcafied through the vanous oil pressure passages (1owservoj revefie servo, clutch apply, converter. etc.) maycause malfunction of the transmission assembly, resultingin cavitation noise in the converter and improper band orclutch application. Overheating may also occur..

lf the transmission is found consistently low on oil, a

thorouBh inspection should be made to find and correctall extemal oil leaks. Transmission oil leakage is noweasily identified as all automatic transmission fluid used isdyed red. The mating surfaces of seflo cover, converterhousing, transmission case and transmission case extensionshould be carefully examined lor signs of leakage.

The vacuun modulator must also be checked to insurethat the diaphragm has not ruptured as this would allowtransmission oil to be drawn into the intake manifold.Usually, the exhaust will be excessively smokey if thediaphragm ruptures due to the transmission oil added tothe combustion. The transmission case extension rear oilseal should also be checked. All test plugs should be

checked to make sure that they are tight and that there is

no sign of leakage at these points. 'I he converter underpanshould also be removed. Any appreciable quantity of oilin this area would indicate leakage at the front pumpsquare seal dng, front pump seal assembly, or front pumpbolt sealing washeIS.

Draining and refillingTo drain the transmissiorl, remove the oil pan drain plugPosition a pan or can to catch the draining oil. If thetransmission is to be removed from the vehicle for repairs,the draining operation may be performed after removal ifdesired.

To refill the transmission, remove dip stick from oil fillertube and refili transnission with oil using a filler tube andfunnei. Then, after shifting into all ranges at idle speed tofill al1 oil passages, the engine should be mn at 800-1000rpm with the transmission in Neutral until the oil warmsLrp, then add oil as required to raise the fluid level to thefull mark on the dip stick. Total capacity includingcoverter is 17.7 pts. for air cooled and 20.1 pts. for watercooled models.

Service adjustmentsFour se ice adjustments are required for AluminumPowerglide equipped ca$: Shift linkage, throttle valvelinkage, neutral safety switch and throttle return checkvalve ( Dashpot) adjustment.

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gear shift control adiustment

linkage adiustmentSet transmission BelI Crank (E) in "PARK" position. SetCont.ol Shaft Lever (A) in "PARK" position. InstallClevis (D) on Rod (B) loosely, attach Rod to BeIl Crank(E) and secure with retainer. With Lever (A) in "PARK"position, adjust Clevis at Lever (A) until clevis pin passesfreely through holes and secure with washer and cotterpin. Check shifts to insure proper operation. Readjustclevis as necessary.

powerglide control lever and bracket assemblyPowerglide control lever and bracket assembly is a straightline shift type, mounted to the floor of the body ratherthan the transmission extension as in the past. Shiftingfrom one detent position to another is done by depressinga round button located in the center of the spherical shiftlever knob. If disassembly of this control lever andbracket assembly is necessary, refer to the Figure for partsbreakdown and relative positioning for assembly.

AUTOIVIATIC TRANSMISSION 8A_3

tlansmission shitt control lever. Raise front and rear ofvehicle. Insert a block of wood between the top of thedifferertial carier housing and the underbody (to prcventupward travel ol the ca[iel when the carier front supportis disconnected).

Disconnect the differential canier front support from itsframe bmcket, by removing the nut on the underside ofthe biscuit mount. Pry the canier downward to telieveload while removing the two center mounting bolts fromthe carier front support. (To pry caffier downward insertcrowfoot end of a pry bar through the openi[g in thecarier front support, hooking end of bar over top of thecenter mounting bolt pad cast in the underside of thecarier).

Pivot carrier support downward for access to prop shaft"U"-joint. Disconnect prop shaft front and then rear "U"bolts. Disconnect parking brake cable from ball socket atidler lever located near center of underbody. Removeprop shaft by moving shaft forward. Remove left bankexhaust pipe. Remove right bank exhaust pipe and heatdser.

Disassemble the transmission mount by removing the twobolts that attach rear mount cushion to the rear mountbracket. Support engine under oil pan and raise engrne toremove load fiom rear mount cushion. To avoid damageto oil pan, a suitable wide base, heavy wood platformshould be placed between the jack pad and the oil pan.

Remove the three transmission mount bracket-to-crossmember bolts, then remove mount bracket. Removethe two bolts from mount pad to transmission case andremove rubber mount cushion and exhaust pipe "yoke".

Disconnect oil cooler lines at transmission and swing linesclear. Remove connector underpan. Remove converter toflywheel attaching bolts. At transmission disconnectvacuum modulator line and speedometer cable. Dis-connect transmission shift linkage from transmissiongea$hift control lever. Remove shift lever. At trans-mission, remove throttle valve linkage and disconnectneutral safety switch linkage, also remove the gearshiftcontrol linkage.

Remove neutral safety switch from transmission controlbracket. Remove transmission output shaft slip yoke andinsert a plastic shipping plug in end of extension toprevent spillage of tnnsmission fluid. The yoke is re-moved to avoid teadng the heat reflecting pad on theunderbody, when the transmission is being removed.Remove bright metal ignition shielding from distributorarea,

Remove the transmission dip stick and tube assembly.Disconnect transmission vacuum modulator line at dis-tdbutor advance line tee. Position transmission hoistunder transmission and attach safety chain to trans-mission. Remove transmission converter housing-to-engineattaching bolts and slide transmission rearward. Observeconverter when moving transmission rearward. [f con-verter does not move with the transmission, pry it free offlywheel before proceeding.

Install converter retaining strap. Lower and removetransmission from vehicle by tilting the front down and to

control lever and bracket assembly exploded

Throttle valve linkage adiustmentWith accelerator pedal depressed, Carburetor Lever on V-8models must be at wide open throttle positior. DashLever must be 1164"-1116" off Lever Stop and Trans-mission Lever must be against transmission internal stop.

POWERGLIDE TRANSMISSIONReplacementDisconnect battery ground cable. Remove ball end from

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the right while intermittently lowering the transmission tofacilitate its removal. Reinstali transmission assembly bypedorming the above steps in reveme order.

Bolt torquesTransmission Case to Flywheel Housing Bolts ....35 ft. lbs.Converter to Flywheel Bolts ...............................35 ft. lbs.

DiagnosisProper operation of the Powerglide transmission may beaffected by a rrumber of factors, all of which must beconsidered when trouble in the unit is diagnosed. Propertrouble diagnosis can only be accomplished when per-formed id a thorough step by step procedute. Thefoilowing procedure has been devised and tested and is

recommended foi all tiouble diagnosis complaints and ifthe sefliceman will follow this checking procedure,accurllte and dependable diagnosis may be accomplished.This will result in a savings of time, not only to theserviceman, but to the customea as well.

Warming up transmissionBefore attempting to check and/or correct any complaintson the Powerglide transmission it is absolutely essentialthat the oil level be checked and corrected if necessary.An oil level which is either too high or too low can be thecause of a number of abnormal conditions from excessivenoise to slippage in all ranges.

lt must be remembered that cold oil will slow up theaction of the hydraulic controls in the transmission. Forthis reason a trouble or oil leak diagnosis should not beattempted until the transmission has been warmed.

Shop warm upConnect tachometer to engine. Set parking brake tightand start engine. Place selector light in "D" (drive) range-Adjust carburetor idle speed adjusting screw to run englneat approximately 750 rpm and operate in this manner fortwo minutes. At the end of two minutes of operation, thetransmission will be sufficiently warmed up for diagnosispurposes- At this point, readjust the engine idle speed to450-475 rpm in "D" range.

Road warm upDive the car approximately 5 miles with frequent startsand stops. At this point, make sure the engine idle speed isset to 450-475 rpm in "D" range.

Checking fluid lev€lAfter transmission has been warmed up, check the fluidlevel with the engine idling, parking brake set and controllever in "N" (neutral). If the fluid level is low, add fluid tobring level up to the full mark on gauge rod.

If fluid level is too high, fluid may be aeiated by theplanet carrier. Aerated fluid will cause turbulence in theconverter which will result in lost power, lower stall speedand lower pressures in control circuits. Lower fluid leveito fu11 mark, then shut off engine to allow air bubbles towork out of fluid.

Basic pressure checksFour basic pressure checks are used for diagnosis andoperational checks for the Aluminum Powerglide trans-mission. Al1 checks should be made only aftet thoroughlywarming up the transmission.

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AUTOMATIC TRANSMISSION 8A-5

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AUTOMATIC TRANSMISSION 84_6

or damaged ring low selvo. I'ressure regulator valve stuck.Leak at valve body to case gasket. Leak bet\reen valvebody gaskets. Leak at seflo center. F.ont pump clear-ances,

Drirr'e Range Overrun (Coast) Pressure With the vehiclecoasting in "Drive" range at 20 25 mph lvith €nginevacuum at approximateiy 20" Hg., Iow servo apply (mainline) pressure should be as shown on the pressure checkchart.

TRANSMISSIONOVERHAUL OPE RATIONSDisassemblyPlace transmission in llolding Fixture J-3289-01 andAdaptem J 9506. Cleanliness is an jmportant factor in theoverhaul of the transmission. Before attemtping anydisassen1trLy operation, the exterior of the case should bethoroughly cleaned lo prevent the possibjlity of dirtentering the transmission internal n]echanism. Duringdisassembly, ali parts should be thoroughly cleaned incleaning fluid and ihen air dried. Wiping cloths or ragsshould not be used to dry parts as lint may be depositedon the parts which may cause later trouble. Do not usesolvents which could damage rubber seals or clutch platefacings. Remove converter holding tool previously in-stalled dnd remove conver tel arsembl\.

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It is not recommended that stall tests be conducted whichwould result in engine vacuum falling below 10" Hg.Pressure gauge hose connectioirs should be made at thelow servo apply (main line) test point. Run the gauge lineinto the driving oompartment by pushing aside the mastjacket seal. Tie line out of the way of the drivers feet andconnect to pressure ga\tge J-2186'7.

Wide Open Throttle Upshift Pressure Check ' Refei tothe pressure check chart for upshift piessure points as

indicated on ihe 1ow servo apply (main line) gauge.

Idle Pressure in "D.ive" Range In addition to the oilpressure gauges, a vacuum gauge is needed for this check.With the parking brake applied and the shift selector leverin "D ve", low servo apply (main line) pressure should beas shown on the pressure check chart,

If pressures are not within these ranges, the followingitems should be ohecked for oil circuit leakage: Pressureregulator valve stuck. Vacuum modulator valve stuck.Hydraulic modulator valve stuck. Leak at 10w servo pistonring (between ring and bore). Leak at 1ow seflo piston rod(between rod and bore). L€ak at valve body to casegasket. Leak at valve body gaskets. Front pump clear-ances. Check passages in transmission case foi porosity.

Manual "Lo\i." Range Pressure Check - Connect atachometer, apply the parking brake, place the selectorlever in "Low" range, and adjust the engine speed to 1000rpm with the car stationary. Low servo apply (main line)pressure should be as shown on the pressure check chart.

Prcssures not wrthin this range can indicate the followingpossibilities: Partially plugged oil suction screen. Broken

Transmitsian mountetl in fixture

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Extensions, governor and rear oil pumpIf replacement is necessary, remove speedometer ddvengear. Loosen capscrew and retainer clip holding speed-ometer d ven gear in extension and remove gear. Removetransmission cxtension by removing five bolts retaining

extension io case, Note seal nnp or

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AUTOI\4ATIC TRANSMISSION 8A_7

ff*:l:_ ll"^a pump crrive pin. I hi\ i5 or e\rreme!rrpoFdnce Do nol lail lo rrmove rl,, a""" pi". ,qfi..removng the drive pin, remove the tear pump wear plate.

R e mov ing ga v erno r a s s emb 11,

lel:ve lhe c clip trom rhe governor shdfr on rhew^erght side,ot rhe governor. lhen"remo.,e the \haft and9".""..ji?.l. ".1",. I.rom rhe oppo5ite ,id. .f ,r,. eo".rn'.i1r::.ro,y .uld rhe lwo bellevi e "pring". Loo-.en-.ih.governor drive screw and remo!e thover rhe enci or rrre ourpui ;;;i. ' "'" Sovernor assembty

l:T._",. ln. tour botls retaining rhe rear ort pu,np ro rheItj::T'':io" case and remove rhe pump boay, ana orainoac( Oaffle. extension seal rine. drirw he n, h e J.ri t e e"., i, .".,.,. j.'ir,l';;i"il,i. T,ui ?,iil|.i;rr rhe hole i\ on rhe bottom oflhe sha u"a ,fri "f,rfil"nonzontal.

R.mavtng tcat t)il llutnp ctrtvz pin

Remortng goyernor rdtvc anJ shalt

AUTOMATICTRANSMISSION 8A_8

Transmission internal componentsRotate the holding fixture until the front of the trans'mission is pointing up and remove the seven front oilpump bolts- The bolt holes are offset to facilitate properlocation upon installation.

Remove the front o11 pump and stator shaft assembly and

the selective fit thrust washer using J-9539 (or two3/8" l6"xl0" stove bolts) and the slide weights fromTool J-6585. Note the two threaded holes in the pump tomount the pullets P-emove the front pump ring seal andgasket- The front pump bolts have special sealing washerswhich must be in place upoI1 installation.

Release the tension on the low band adjustment, thcn,with transmission hodzontal, gtasp the transmission inputshaft and carelully work it and the clutch assembly out ofthe case, Use care so as not to lose the low sun gear(splined) bushing from the input shaft. Ihe low sun gear

thrust washer will probably r.main in the planet carner'

Remoring clutch dtum antl input shaJt

Use care so as not to damage the machined face on thefront of the clutch drum. The low brake band and strutsmay now be removed. Make certain that the rear pumpddve pin has been removed, then remove the pla[etcarrier and the output shaft thrust caged beanng from thefront of the transmission.

Remove the reve$e ring gear if it did not come out withthe planet callier- Using a large screw diver remove thereverse clutch pack retaincr dng and then lift out thereverse clutch plates and the (waved) cushion spring- Ifdifficulty is experienced in getting the snap ring past theshoulder on the reverse pack pressltre plate, a feeler gaugemay be used as a guide.

Install Tool J-9542 through the rear bore of the case withthe flat plate on the rear face of the case and turn down r2sthe wing nut to compress the rear piston spring retainerand springs, then remove the snap dng. Tool J-8039 may

beJ-Ipir

Removing speeclotlrcter drire gear Rit

Remaring front oil PunP

be used to remove the snap ling if desired. Remove ToolJ-9542. the reverse piston spring retainer and the 17piston retum springs.

AUTOMATIC TRANSIVIISSION 8A-9

Oil pan and valve bodyThe oil pan and valve body may be sefliced without thenecessity of removing the extension and internal com-ponents covered in the preceding steps. Rotate theholding fixture until the transmission is upside down andthe oi1 pan is at the top. Remove the oil pan attachingbolts, oil pan and gasket. Remove the vaclrllm modulatorand gasket, and the vacuum modulator plunger, dampen,ing spdng and valvg.

Vacuum modulator, dampening spring, plunger and valve

Remoting rcat piston spting retdiner snap r[ng

Remove the rear piston by applying air to the reveme portin the rear of the transmission case. Remove the inner andouter seals. Remove the three servo cover bolts, seflocover, piston and spdng.

Valre bod! remaNal

Remove the two bolts attaching the detent guide pla1e tothe valve body and the transmission case. Remove theguide plate and the range selector detent roller sp ng.,lppl!ing dt to remore rear piston

AIJTOMATIC TRANSMISSION 8A-10

Inner contral levers, ptltking pa\rl and bracket

Remove the remaining valve body-to-transmission case

attaching bolts and carefully lift out the valve body andgasket, disengaging the servo apply tube from the trans-mission case as the valve body is removed. lf necessary,the TV. shift and parking actuator assembly levers, and

the parking pawl and bracket may be r€fioved.

OVERHAULING UNIT ASSEMBLIESConverter and stator'l'he converter is a welded assembly and no internal repairs

are possible. Check the seams for stress or breaks and

replace converter if necessaly.

FRONT PUMPSeal replacementIf the front pump seal requiles replacement, remove thepump from the transmission, piy out and replace the seal

iDtiu" tr"* seal into place, fuliy seated in counterbore,using J-6839). Then, if no further work is required on thefroni pump, reinstall it in the case. Outer diameter of theseal should be coated with non hardening sealer prior toinstallation.

DisassemblyRemove bolts attaching pump cover to body and lemovethe cover. Remove pump gears from body Do not drop ornick geals. These gears ate not heat treated Remove therubber seal ring from the pump body.

lnspectionwash ali parts in cleaning solvent and blow out ali oilpassages. DO NOI USE RAGS TO DRY PARTS. Some

soLvents may be harmful to rubber sea1s.

Inspect pump gea6 for nicks or damage. lnspect body endcovel faces for nicks or scoring, Inspect covel hub O.D,

for nicks or burls which might damage clutch drulnbushing joumal. Check for free operation of the prirningvalve and rcpiace if necessary.

Inspect body bushing for galling or scoring. Checkclearance between body bushing and converter pump hub.Maxirnum clearance is .005". If the bushing is damaged,the front pump body should be replaced.

Checking pump bocly bushing to c()nrerter

PumP hub cledrunce

lnspeci converter housing hub O.D. for nicks or bullswhich might damage front pump seal or bushing Repair

or replace as necessary. If oil seal is damaged or is leaking(and the pump body is otherwise suitable for reuse), pry

out and install a new seal, fully seated in counterbore,using Seal Driver J'6839. Outer diameter of seal should be

coated with a non-hardening sealer pdor to installation.

On water cooled models so equipped, check condition ofoil cooler by-pass valve and replace if valve leaks exces-

sively. For removal, an "Easy Out" or its equivalent may

be used. For installation tap seat in place with soft

hammer or brass drift so it is flush to .010" below the

surface,

With parts clean and dry, install pump gears and checkl

Clearance between O,D. of driven gear and body should

be .0035'L.0065". Clearance between I.D. of driven gear

and crescent should be .003'L.009". Gear end clearance

should be .0005' -.001 5 ".

AssemblyWith the transmission facing up, remove the inpul shaft,

clutch drum. low band and struts as ouUined under

"Transmission Disassembly." Install the downshifttiming va1ve, conical end out, into place in the pump

covcr to a height of 17/32" measured ftom the shoulder

of the valve assembly to face of pump cover- Oi1 ddve and

diven gears generously and install in the pump body

AUTOMATIC TRANSMISSION BA- 11

42

/ 1o .,0

',t / 3837

.0 j // )o )' ,o'" ;"'.(; A f )' )' 30,v,t0

h ,,li 'r!y'" \ )o

il] , -.----*zz ia7/C., -'- _

'"I i,/yo t{ \,

48 47l/46

-@J-18 l9 2O

'( \ !.'ts.ap,

l'Nl\\'2l 22 23

49/\^:{]

''cA(, 1 {' -_ t'"$-l'4:\x rr- 12

_t'[-J.{itlIO t

9 /6r* 7

Internal Mechanism exploded r)iew ltypical)

Ldrum)iming

Checkrp hub.naged,

burnRepaireakingi), pry

lrbore,uld be0n,

don ofexces-

maysoftihe

1.

2.

3.4.

5.

6.1.

8.

9.10.11.

t2.

I3.

Converter assemblylnput shaftInput shaft oil seals

Front pump to case attachingbolts and sealing washers

Low sun gear bushingFront pump oil seal

Front pump bodyFront pump io case oil seal

Front pump drive gear

Front pump driven gear

Downshift timing valvefront pump covcl to pump body

Front pump cover and converter

15. Clutch drum thrust washer(selective fit)

16. High clutch seal rings17. F.ont pump priming valve

18. Front pump priming valve spring19. Front pump priming valve spring washer20. Front pump priming valve

sping retaining pin21. Oil cooler by'pass valve spring22. Oil cooler by-pass valve

23. Oil cooler by-pass valve seat27. band apply strut28. Band anchor strut29. Band anchor adjusting screw30. Band anchor adjusting screw nut27. Band apply strutI l. Low brake b,nd

32. Cllulch drum33. Clutch drum bushing34. C'lutch piston outer and inner seals

35. Clutch piston36. Clutch retum springs37. Clutch spdng retainer38. Clutch spring retainer snap ring39. Clutch hub front thrust washer40. Outch hub41. Ctutch driven plates (flat)42. Clutch cushion spring (waved)43. Cutch drive plates (rvaved)44. Clutch huh rear thrust washer45. Low sun gear and clutch flange assembly46. Clutch flange retainer ring47. Planei carrier and output shaft asser bly,18. Rear punp drive pin49. Output shaft ihrust bsring

stator shaft14. lront pump gasket

AUTOMATICTRANSMISSION 8A_,I2

Checking driren gear to pumP bodi clearance

Driren gear ta cretcent cledrance

Assemble dive gear with recessed side of the dive lugsdownward facing the oonverter.

Carefully set the pump cover in place over the body andIoosely install 2 attaching bo1ts. Place the pump assembly,less the rubber seal ing, Lrpside down into the pump boreof the case (use guide pins if desired). Install remainingattaching bolts and torque to specifications.

Remove pump assembly from case borc. Rcplace theclutch drum and input shaft, low band and struts as

outlined under "Transmission-Assembly." If necessary,remove two bolts and use J-6585 puller and J-6585-3adapters to remove pDmp assembly. Replace and retorquebo1ts.

Replace rubber seal dng in its groove in the pump bodyand install the pump assembly properly in place in thecase bore, using a new gasket, being sure that the selectivefit thrust washer is in place. Install the attaching bolts,using new bolt sealing washers if necessary.

Rear pumpThe rear pump is removed and disassembled as descdbedin the "Transmission-Disassembly" procedures earlier inthis section. General cleaning and clearance check infor-mation will remain the same as for the front pump.Assembiy of the rear pump is described in the "Trans-

ission-Assembly" procedure later in this section.

When reinstalling the rear pump priming vaive, retain thewasher, spdng and valve in the bore with the retainingseat, install small hole first. Install retaining seat flush to.02" below suiface of pump face. When properly installedthe tip of the valve must extend above the face of thepump to insure pdming valve operation.

Rear pump bushing replacementIf the rear pump bushing must be replaced, it may b€removed using lool J-9557 (and Handle J-7079) andre-installed using Tool J-6582, pressing or driving thebushing in from the front of the pump.

CLUTCH DRUIVIDisassemblyWhen working with the clutch drum, use exttelne carethat the machined face oI1 the front of the drum not bescratched, scored, nicked or otherwise damaged duringany of the following service operations. This machinedface must be protected whenever it must be brought tobear on a press or tool ofany sort.

Remove retainer ng and low sun gear and clutch flangeassembly from the clutch drum. Remove the hub rearthrust washer. Lift out the clutch hub- then remove theclutch pack and the hub front thrust washer.

Remove the spdng retainer using J-9542 or if using anarbor press, use J-5 133 and J-7782 adapter ring. Compressthe spdngs far enough to allow removal of the tetainersnap iil1g; then, releasing pressure on the spdngs, removethe retainer and the springs. When using J-9542, place apiece of cloth or cardboard between the tool and thefront side of the clutch drum as protection fo. themachined face. Lift up on the piston with a twistingmotion to remove from the drum, then remove the innerand outer seals.Checking geat end cLearance

Remalring clutch spring retainet snap ring

lnspectionWash all parts in cleaning solvent (air dry). Do not use rags

lo dry parrs. check drum bushing lor scoring or excessivewear. Check the steel ball in the ciutch drum that acts as a

reiief valve. Be sure that it is free to move in the hole andthat the oriface leading to the front of the drum is open.If the clutch relief valve check ball in the clutch drum isloose enough to come out or not loose enough to rattle,replace the clutch dnrm as an assembly. Replacement orrestaking of the ball should not be attempted.

Check fit of clutch flange in drum slots. There should beno appreciable radial play between these two parts Alsocheck low sun gear for nicks or burs and bushing forwear. Check clLrtch plates for buming and wear.

Bushing replacementRemove the old bushing with Tool J-9546 using care notto damage the bushing bore or the machined face on thefront of the clutch drum. Use the same tool to install thenew bushing. Press (do not hammer) the bushing into theclutch drum from the machined face side of clutch drum.Press only far enough so that the tool meets the clutchdrum. Do not force the tool against the clutch dtummachined face.

AssemblyInstall new piston inner seal in hub of clutch drum withseal lip downward (toward front of transmission) Install a

new piston seal in clutch piston. Seal lips must be pointedtoward the clutch drum (front of transmission). Lubdcateseals generously and install piston in clutch drum with a

twisting motion. Place the springs in position on thepiston, then place the retainer in place on the spdngs

Using Tools J-5133 and J-7?82 and a press, or J-9542 as a

hand operation, depress the retainet plate and sp.ings iarenough to allow installation of the spdng retainer snap

ring in its groove on the clutch drum hub.


Instail the hub front washer with its Lip toward the clutchdrum, then install the clutch hub. Install (wave) cushionspdng wherever used, see chart. on 396 V-8 models only,the first driven plate to the rear of the cushion sping is a

selective fit. Before installing plates to clutch drum, stackthe (5) ddve and (5) ddven (exc. selective fit) plates andmeasurc this stack height. New rcfet to chart and selectthe proper selective ddven plate and install it into clutchdrum on top of the cushion spdng.

Install the steel reaction plates and faced drive platesalternately, beginning with a steel reaction plate. Seeclutch chart. Install the rear hub thrust washer with itsflange toward the low sun gear, then install the low sungear and flange assembly and secure with tetainer nng.When installed, the openings in the retainer dng should beadjacent to one of the lands of the clutch drum. Checkthe assembly by turning the clutch hub to be sure it is freeto rotate.

Remoytng and [nstalling clutch drum bushing

REACTION PLATES

SETECTVE FIT FOR350, 396, AND 427V 8 ONLY

(WHEREVER USED; SEE CHART)

[nstalhng clutch drum plates (typical)


Low bandThe brake band used in the Aluminin1 Powerglide transmission has bonded linings which, due to the transn!ssioncharacteristics and band usage, should rcquire very littleattention, IIowever, lvhencver a transmission is disasse _

bled the band should be cleaned of metal particles andinspected.

Check lining for evidence of scoring ot buming. Checkband and lining for cracks. Check all band linkage for

PLANET ASSEMBLY AND INPUT SHAFTlnspectionWash planet carier and input shaft in cleaning solvent,blow oLrt all oil passages and air dry. Do not use mgs todry parts. Inspcct planet pinions for nicks ot other toothdamage. Check end clearance of planet gears. Thisclearance should be .006'r.030".

Check input sun gear for tooth danrage, also check inputsun gear rear thrust washer for damage. lnspect outputshaft bearing sudace for nicks or sconng and inspect inputpilot bushing. Inspect input shaft splines for nicks ordamage and check fit in clutch hub and input sun gear.Also cheok fit of splines in turbine hub. Check oil sealrings for damage; rings must be free in input shaft ringgrooves. Remove dngs and insert in stator support boreand check to see that hooked ring ends have clearance.Replace rings on shaft.

that the front (parking lock gear, end) of the assemblylaces up. Using prick punches ot other sirnilar nleans,mark each pinion shaft 3nd also thc planet calrierasscmbly so that reassenrbling, each pinion shaft will be

reinstalled in thc same location from which it was

removed. The pinion shafts are not selectively iit but it isgood practice to reinstall the in theh original locations

Suggested pinion shaJt markings

Remove the pinion shaft iock plate scrcws and rotate thelock plate counter-clockwise sufficiently to remove it.Starting with a short planet pinion, and using a solt steel

drift, drive on the lowet end of the pinion shaft until thepinion shaft is raised above the press fit area of the outputshaft flange. Fced J-4599 into the short planet pinionfrom the lower end, pushing the planet pinion shaft aheadof it until the tool is centeted in the pinion and the pinionshaft is removed from the assembly. Planet pinionremover and teplacer Tool J-4599, comes in two pieces,

both alike. Oniy one is used when lemoving the pianetpinion;two, however, must be used when reassembling

Remove the short planet pinion fiom the assemblyRemove J-4599, needle beadngs and needle beadngspacers (3.) from short planet pinion. Use care so as not tolose any of the planet pinion needle bearings. Twentyneedle bearings are used in each end and are separated bya beadng spacer in the center.

By following the procedure as outlined, remove theadjacent long planet pinion that was paired by thrustwashe6 to the short planet pinion now removed Twentyneedle bearings are used in each end of the long pinion,separirted by a beadng spaoer in the center'

Rerdisarcmplarinprparl

Recniclthn

ReIneeexcA1s,

InsloutTo(usirbyend

UsibeapinholplarbIvcailgea:

clo!pin:

Checklng planet ge cnd cleanTnce

RepairsThe large planet carrer asse bly now has the pinionshafts flared at each end for retention into the carrier' Nooverhaul of the large planet carier assembly should be

attempted.

Small planet carrier assembly - overhaulIf dudng inspection, the ptanet pinions, pinion needle

bearing. pinion thrust washers, input sun gear, and/orinput sun gear thrust washer should show evidence ofexcessive wear or damage, they should be replaced.

Place the planet carrier assembly in e fixture or vise sot_

2.

3.

ffi

Remove the upper and lower thrust washers. Remove anddisassemble the remaining planet pinions, in pairs, by firstremoving a short planet pinion and then the adjacent longplanet pinion. Remove low sun gear needle thrust beadng,input sun gear and input sun gear thrust washer. Wash allpa s in cleaning solvent and air dry.

Recheck the planet pinion gears and input sun gear fornicks or othel tooth damage;also check the planet pinionthrust washers and input sun gear thrust washer. Checklow sun gear [eedle thrust bearing for spalled needles.Replace worn or damaged parts. Inspect the planet pinionneedle beadngs closely and if there is indication ofexcessive wear, all the needle beanngs must be replaced.Also inspect pinion shafts closely and, if worn, replace thewom shafts.

Inspect the input shaft bushing installed in the base of theoutput shaft. If damaged, it may be removed by threadingTool J-9534 into the bushing and pulling the bushing outusing Slide Hammer J-6585. New bearing can be installedby pressing in flush or below thrust surface with the pilotend of input shaft as press tool.

Using J-4599, assemble needle bearing spacer and needlebearings (20 in each path) in orle of the long planetpinions. Use petroleum jelly to aid in assembling andholding the needle bearings in position. Position the longplanet pinion with J-4599, centered in the pinion assem-bly and with thrust washers at each end, iJI the planetcarier. Oil grooves on thrust washers must be towardgears. The long planet pinions are located opposite theclosed portions of the carrier, while the short planetpinions are located in the openings.


Feed the second J-4599 in from the top picking up theupper thrust washer and the planet pinior and pushing theaheady installed Tool J-4599, out of the lower end. Asthe first tool is pushed down, check that it picks up thelower thrust washer. Select the proper pinion shaft, as

marked, lubdcate the shaft and install it from the top,pushing the assembling tools ahead of it. Tum the pinionshaft so that the slot or groove at the upper end faces thecenter of the assembly. With a brass or soft steel ddft,drive the pinion shaft in until the lower end is flush withthe lower face of the planet carrier.

Following the same geneal procedure as outlined, assem-ble and install a short planet pinion in the planet carieradjacent to the long planet pinion now installed. Thethrust washen already installed rnith the long planetpinion also suffice for this shod planet pinion as the twopinions are paired together on one set of thrust washe$.

Install the input sun gear thrust washer, the input sun gearand low sun gear needle thrust bearing. Assemble andimtall the remainilg planet pinions, in pairs, by firstinstalling the long planet pinion and then the adjacentshort planet pinion. Check end clearance of planet gears.This clearance should be .005"-.030". Place the pinionshaft lock plate in position, then with the extendedportions of the lock plate aligned with slots in the planetpinion shafts, rotate the lock plate clockwise until thethree attaching screw holes are accesible. Install the pinionshaft lock plate attaching screws and tighten to specifica-tions.

GOVERNORThe governor assembly is a factory balanced unit. If body

2

i",W:;r&^"J,,.e;, \-- ,zr--\'V u=_rr@"un

Small planet carriet assefibly exploded t,iew

1. Pinion shaft lock plate

2. Pinion th st washer3. Pinion shafi

4. Neealle beadng washer

5. Short planet pinion gear

6. Ncedle bearings

7. Long planet pinion gear

8. Low sun gear thrust bearing9. Input sun gear

10. lnput sun gear thrust asher

11. Carier and output shaft

AUTOIVIATIC TRANSMISSION 8A_16

ro i

rl"Li )"\-)

' \o\J\^..-U'w

l1

I

2

itf\l

Plafrogo\attlloo

ReReDisthedetbetta

DisReReborgas

spr

Fr<val

ddth€thene(vaIadjfacHo"TDrdo

Frrval

ICIass

Rebovalpr(

1. Valve to shaft retaining snap dng2. Valve3. Shaft4. Damping spings5. Body6. Outer weisht

Goretnot - exploded view

7- Spring8. Inner weight9. Inner weight to outer weight

retaining snap ring10. Outer weieht to body ietaining

snap ring

11. Body to hub screws and lock washer12. Gasket13. Hub drive screw14. Hub15. Hub oil seal rings16. Inner weight to shaft retaining snap dng

replacement rs necessary, the two sections must bereplaced as a unit. Remove the govemor as outlined under"Transmission-Disassembly. "

DisassemblyThe govemoa valve and shaft were already disassembledfrom the assembly during the removal procedutes. Re-move the outer weight assembly by sliding toward centerof body. Remove the smaller inner weight retaining snapring and remove the inner weight and spdng. If it isconsidered necessary, remove the four body assemblybolts and separate the body, hub and gasket. Remove thetwo seal dngs.

lnspectionClean all parts thoroughly in a solvent and air dry. Checkconditions of all component parts of the assembly.Replace any bent, damaged or scored parts. Body and hubmust be replaced as a unit.

AssemblyReassemble govemor weights and reinstall in body bore.Replace seal dngs on hub. Slide hub into piace on outputshaft and lock into place with the drive screw. Installgasket and govemor body over output shaft, installgovernor shaft, line up properly with output shaft andinstall body attaching bolts. Torque to specifications.

ln!Sirotlpris:otl

As!Rethen9(sprgas

borTo

lns136 r37 lns

unl

Place tmnsmission selector lever in PARK to keep shaftfrom tuming while tightening these bolts. Check thegovemor weight for free ht in body after the fou.attaching bolts are torqued. If the weight sticks or binds,loosen the bolts and retotque.

VALVE BODYRemovalRemove valve body as descdbed under "Transmission-Disassembly." lf performing the operation on the vehicle,the vacuum modulator and valve, oil pan and gasket, guidedetent plate and range selector detent loller spdng mustbe rcmoved in order to remove the valve body from thetransmission.

DisassemblyRemove the manual valve, suction screen and gasket.

Remove valve body bolts and carefully remove lower valvebody and transfer plate from uppel valve body. Discardgaskets. Remove the front and lear pump check valves andspdngs.

From the upper valve body, remove the TV and detentvalves and the downshift timing valve. TV and DetentValve Remove the retaining pir1 by wedging a thin screw

diiver between its head and the valve body, then lemovethe detent valve assembly and throttle valve spdng. Tiltthe valve body to allow the throttle valve to fall out. Ifnecessary, remove the "C" clip and disassemble the detentvalve assembly. Do not disturb the setting of theadjustment hex nut on the detent valve assembly This is a

factory adjustment and should not normally be changedHowever, some adjustment is possible if desired. See

"Throt e Valve Adjustment." Downshift Timing Valve -D ve out the roil pin, remove the valve spring and thedownshift timing valve.

From the lower valve body, remove the low-drive shiftvalve and the pressute regulator valve. Low-Dive ShiftValve - Remove the snap dng and tilt the valve body torcmove the low-dive legulator valve sleeve and valveassembly, valve springs and the shifter valve. PressurcRegulator Valve Remove the snap dng, then tilt valvebody to remove the hydraulic modulator valve sleeve andvalve, pressure regulator valve spdng retainer, spring andpressure reguiator valve assembly.

lnspectionSince most valve failures are caused initially by dirt orother foreign material preventing a valve from functioningproperly, a thoiough cleaning of all parts in ciean solventis mandatory. Check all valves and their bores for burrs orother deformities which could result in valve hang-up.

AssemblyReplace valve components in the proper bores, reversingthe disassembly procedurcs glven above and checking ifnecessary. Place front and rcar pump check valves and

spdngs into place in the upper valve body and install thegasket and transfer plate. Carelully install the lower valvebody and easket and install 15 1-3/8" attaching bolts.Torque to specificatiolls.

lnstallationlnstall the valve body onto the transmission as outlinedunder "Transmission-Assembly."


VACUUM MODULATORThe vacuum modulator is mounted on the left rear of thetransmission and can be se iced from beneath the vehicle.

RemovalRemove the vacuum line at the vacuum modtllator.Unscrew the vacuum modulatot from the transmissionusing J-9543, if available, or any thin l" tappet typewrench. Remove the vacuum modulator plunger, damp-ening spring and valre lrom rhe Iransmission cdse.

lnspection and repairsCheck the vacuum modulator plunger and valve for nicksand burs. [f such cannot be repaired with a slip stone,replace the part. The vacuum modulator can be checkedwith a vacuum source for leakage. However, leakagenormally results in transmission oil pull-over and results inoil smokey exhaust and continually low transmission oil.No vacuum modulator repairs are possible; teplace as anassemblY.

lnstallationInstall vacuum modulator valve, dampening spring andplunger in bore of transmission. Place a new gasket onvacuum modulator. The gasket has centering tabs to holdit centered during installation. lnstall vacuum modulator,tighten firmly, and install vacuum line. Rubber tubing"A" should bottom against modulator cam. Pipe assembly"B" should bottom against the modulator extension.

TRANSMISSION CASElnspectionWash case thoroughly with cleaning solvent, air dry andblow out all oil passages. Do not use mgs to dry pats.Inspect case for cracks which may cont bute to leakage.Tnspecl case rear bLr.hing for damage or e\cessive wear.This is a precision bushing and if damaged or wotnexcessiv€ly must be replaced. Check shifter shaft seal. If itshows signs of damage or leaking, pry it out and install anew seal. The new seal must be firmlv seated in casecounterbole.

Rear bushing - teplacementTransmission case rear bushing is a precision bushingwhich requires no reaming or finishing after assembly.Remove bushing by ddving oi pressing from within case

using J-9557 and Handle J-7079. To instafl new bushing,ddve or press bushing into place from rear of case usingTool J-9557 and Handle J-7079. Install bushing only untilshoulder of J-9557 contacts the rear face of the case.Excessive force, either hammering or pressing may crackor otherwise damage the aluminum case.

TRANSIVIISSION EXTENSIONlnspectionWash extension thoroughly with cleaning solvent and airdry. Do not use rags to dry parts. Inspect extension forcracks that may contdbute to leakage. lnspect extensionrear bushing for damage or excessive wear. lnspect rear oi]seal and replace if damaged or wom.

Rear bushing - replacementFor seflice, the transmission extension rear bushing is of a

precision type which requires no reaming or finishing aftelinstallation. Place transmission extension in an albot press


l. Snap ing2. Hydraulic modulator valve decve

3. Hydraulic modulator valve

4. Pressure regulator spfing tetainer5. P.essure regulator sPring

6. Pressure regulator sPring seai

7. Pressurc regulator valve and

dampencr assembiY

8. Lowcr valve body9. Suction scrcen, gaskei and atiaching

i0. Low and ddve valve11. Lo$r' and drivc valve inner spring

12. Low and drivc valve outer spring

13. Lo$ and drive regulator valvc

1,+. Lo\{ and drive reg lator valvc

Yalve bodl exploded view

ext

lns"8',sprofllnsbolpa\

Instheparou1casToselrbetassr

prcSeawit

TRAssUs€

tohea

15. Snap ring16. Transfer plate to lower valve

body gasket

17. Transfer Plate18. Transfer Plate to uPper valve

body gasket

19. Front pump ch€ck valve and sping20- Rear pump check valve and spring

21. Iligh speed down shift timingvalve stop pin

22. High specd down shift timingvalve spring

23. High speed down shift timing valve

24. Upper valve body25. Manual control valve

26. Vacuum modulator valve,

plunger and spring (e\c. L4 & L-l94)

27. Throttle valve28. Throttle valve spring29. Throttlc valve spring seat

30. Throttle valve spring regulatorguide washer

31. Dctent valve spring32. Detent valve

33. Throttle valve spring regulator34. Throttle valve spring regulator nut35. Upper valve body plate gasket

36. Upper valvc body plate

l?. Deient valve and spring retainjng stud

38. Range selector detent lever39. Snap rjng40. Upper valvc body plate to upper valvc

body attaching bolis and washers

t3 1,4

t2 I I

liiP

r5

It0

\

11

i

^^ 3r'

,, 32 \ I:o i' i |,,^';

29 t I t-/

I I >o'

'38

39

51, 1

" 3 i i."\ I .,'l

r \^* '

INDENTATION

GAsKET IDENTIFICATION

---

Installing casc reat burhing

rcar cn.l up. Using J-5778, press old bushin,r fromc\ten\i^n l rd. c neq l-u.hing ot nllor (n,l uj t_: :-b JnLl

p es. t, tnl. nl .( i, Rep t\ e <.<'ensj.r rcd. oi .c-.. u.lngSeal Installer J-5154. prelubricate betrveen lips of seaiwith cup greasc.

TRANSMISSIONAssemblyUse only transmission oil or petroleum jelly as lubdcarltsto retain bearings or races during assembly. Lubricate allbearings, seal rings and clutch plates prior to assembly.

In.r.lJl the p"r(rng Io.k fawl .rnd.halt and.nserr a nc$| flng rJ'drner. ln.tdLl the nJ-(ing lock I,dwl full bJckspring over its boss to the rear of the pawl. l.hc short legof the spring should locate in thc hole i; the parking pawiInstall the parking lock pawl reaction bracket with iti twobol .. I i.t lhc_.. urlor:t\.(tna ! her\ een ,nc narllng loLkpr$l dnd thc blrcket

lnsert the outer shift lever into the case, being careful ofthe shaft sea1, and pick up the inner shift lever andparkin-g lock assembly and tightli]n allen hcad screw. InseItouter TV levcr and shaft, special washer and .,O,, ring into.r c r1d nick up .rnrr l\ le\cr. I ighrcn .rl,cr herj nut.lo p e\erl po\..Lle bjruing bc,v(el thr,r le dnd ronge.e cclOr cont.Ol.. .010 to .0.'0 clear.T, c -nu., rxt)tbetween inner TV lever and inner shift lever aftcrassembly. Thread the lolv band adjusting screw into case.


Transmission internal componentslnstall the inner and outer seals on the reverse piston and.lurbrt, al.rg tn( p ,ton Jnd rd\c $ith ,*n,-ni,,,o;

-;;;instali the piston into the case. If neccssary, carefully slidea feeler gauge around thc outer diameter of thc pision tostad thc seal ring into the bore. With the suppoit f.ixtureturned so that the transmission case is facini up, instatithe l7 reverse piston return springs and ttre;t ritainer ring.

Carefully instali Tool J 9542 over the retainer ng andthrough the rear bore of the case. With thc flat pla_te onthe rear face of the case, turn down on the wing nut tocompress thc return spdngs and allow the retain-ing ringsnap ring to be installed. Rcmove tool J_9542. Use'car!when perform-ing this opcration that the spring retaineiiscorecUy guided over the case intemal hub and is notdamaged by catching on the edge of the hub or in thesnap nng groove. Install the large (waved) cushion snrine

Ins talling rej)erse piston

Lubicate and install the reve$e clutch pack beginningwith a_reaction (spacer) plate and alternating with th;drive plates (faced) until all reaction plates aid all drivepldte. ,-e.ln nldce. I hc notcled lug nn .3s1. rc.r. lion llr,e|s ..lsralled in the groove .r _ o'clock lo\ lion tn the care.Tl<n ,rsral' lhe_lhick prc\\ure pla,e hi.h har a ..6;ln01"..i1 one lug to rlign ujth thc .ame \lor ,n

'he ca.e a, llte

'ro .heJ lugi on heotherrcaclionplates. l)/r1d roh.u.'n. V v moJcl.hrve b recLtjor Jn.l b ori\c pl"te..

Install the ciutch plate retaining .ing. With the rear of thelransmtsston case downward, align the internal lands andgtooves of the reverse clutch pack faced plates, theneigage the re\rerse ring gear uifh thLj\r J.Idtes. ThisengJlim, nt .r'ru.

ke rraJr \\ .te..' sh e ,ieglirg andturnrng the rjnq gc.tr,

,.-


Remove the rubber seal ring from the front pump bodyand, using guide studs from J-3387 set, install clutch drunrselective thrust washer, front puftp gasket and frontpump to case. Install two pu p-to-case bolts.

To check for collect thickness of the selective fit thrustwasher, move transmission so that oLrtput shaft pointsdown. Mount a dial indicator so that plunger of indioatoris resting on end of the input shaft. J 5492 may be uscd tosupport the dial indicator. Zero the indicator. Push up onthe transmission output shaft and observe the totalindicator nlovement. 'fhe indicator should read .02lJ" to.059". If the reading is within limits, the propcr selectivefit washcr is being used. If the reading is not within limits,it will be necessary to rcmove the front pLlmpj change to a

thicker or thinner selective fit thrust washer, as requiredto obtain the spccified clearatce, and repeat the abovechecking procedure. Clutch drum sclective thrust washe$are a!ailable in thicknesses of .061", .078", -092" and. 106 ".

Place the output shaft thrust bearing over the output shaftand install the planetary carrier and output shaft into thetransmission case. Move the transmission into a horizontalposition. The two input shaft seal rings should be in placeon the shaft. Install the clutch drum (machined face first)onto the input shaft and install the low sun gear bushing(splined) against shoulder on shaft. Install clutch drumand input shaft assembly into casc, aligning thrust needlebearing on input shaft and indexing low sun gear with theshort pinions on the planet carder.

I ns talling clutc h p la te s I t y pical)

Cltecking end play fot prt)pcr thtust \rashet sclection

il

IrII

ea

Install the scflo piston, piston ring, and spring into theservo bore. Then, using a new gasket and "O" ring, installthe seffo cover. See that gasket is properly aligned withthe three bolt holes and the drain back passage in the case.Remove the front pump and the selective lit washer fromthe case, and install the low brake band, anchor and applystruts il1to the case. Tighten the ]ow band adjusting screwenough to prevent struts from falling out of case.

Placc the seal ring in the groove around the front pumpbody and the two seal rings on the pump cover extension.lnstall clutch drum selective thrust washer, front pumpgasket and front pump to case. Remove guide pins andinstall all pump bo1ts, rcplacing any damaged bolt sealingwashcrs necessary and torque bolts to specifications.

Extension. governor and rear oil pumpTurn transmission so that shaft points upward, Instalirearpump wear plate, ddve pin, and ddve gear, indexing gear

,-n' lItInstallinK laedts.t

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ro dll\/ nrn. ln.rall rear pump body dnd dri\en gca.. d ra.nb., \ b rtfr. arLl p mp t. ca\i r J..hing L,^lr\. Bolt hole,d,-. po\iiioncJ \o hal rhe punrp tna) be.r.se161",y on1, nthe proper po\rtLon.

Install govcrnor over output shaft (See .,Governor-Assembly" for body to hub installation.) Install governorshaft and valve, two Be eville washers (concave side ofwashers against output shaft), and retaining ,.C,, clips.Ccnter shaft in output shaft bore and tightin govcrn'oihub drive screw.

Lhing Tool J-5814, jnstall speedonlcter gear into outputshafl_ I'lace extensjon seal ring over rear pump body indinslall transnrission extension and five retainins bolts Ifrc ,o\iJ. reolir.e.fLpJon.el(r d \c.r fcd..

Oil pan and valve bodyW. h, r'Jn,_ni.\r ,n up,irJr d,,*n. JnJ nrrr rrt 'in(-fc.- 'l-llcd r: pr(\ ,r..ly dc\L LeJ. ,n I rh( .e rc,o. tcrprdrtrr' rolle 'n\lJ Icd. in..r:tll lrrc vJl\c Lody r.e1o.,pplyiubc installcd) and a new gasket. Carefuly juide the serviapply line into its boss in the casc as thc v;lve body is setinlo t1,... Inr'dll .i\ 'rou, inr b^lrr,r.l ,rrgc.clc.turd(r' nr fnll(r .prind. fo\i,ion th( .r "nrJ ,,lvr ,, trrr, rglrrt, Jullr 'orw,,tl !^t r.r m\tJllirg ral,e ,,oJr Lo 1l.,ree r. ly p:L L p rlrc , r1-al v.ll\c.


input and output shaft must be rotated simultaneouslv tolroperl) ,enrLr Ihe ,ou h.rnd u.1,he.ldl..n d,utn. licnback off four (4) complete turns for 4 band which hasbecn n use lor 1.000 I<.,,r tnor(, .,, { tutn\.urn n(t!bdnd. T'ghren thr lo, knul to .nc, rli(d rorqu.. Thearlourr of bdik orJ ic nol dr dpptorimarc llg(.r;, it q-!rst

Installing wlrc body

Install the guide plate making sure that the inner leverproperly picks up the nlanual valve. Install attaching bolts.Install the vacuunt modulator valve and the vacuummodulator and gasket. Install the oil pan, using a newgasket, and the oil pan attaching bolts. Install c;nvcrterand Safety Holding Strap J 9549 or a suitablc substitute.

Low band adjustmentTighten the low servo adjusting scrcw to zl0 inch 1bs_ usingtorque wrcnch, J-5853 and a 'l132,, 11ex hcad driver. The

Installing detent guide plate

La\N hand adjustment

Throttle valve adjustment\^ Tro\i.jon , ma,J-.ror .he. kirg lV pres.Lrc.. llo$evc.,rl opeJ.rior ol he trlr .m..\,on lc .r-.h .lrJr .or r(a,11g5r1.n, olrlre l\ i. ir Ii..:.cd pre.,rre..n.) L..rr {dor l^4(..d bi .J :.|ng rhe fo\i ion o, he rrt.r n,L orr rhe


throttle valve assembly. To raise TV pressure 3 psi,backoff the jam nut one (1) full tum. This increases thedimension from the jam nut to the throttle valve assembiystop. Conversely, tightening the jam nut one (1) full tumlowers TV pressure 3 psi. A difference of 3 psi in TVpressure will cause a change of approximately 2 to 3 MPHin the wide open throttle upshift point. Smaller prcssureadjustments can be made by partial tums of the jam nut.The end of TV adjusting screw has an allen head so thescrew lnay be held stationary while thejam nut is moved.Use care when making this adjustment since no pressuretap is provided to check TV pressure.

TV ddiustment nut

TURBO HYDRA-MATIC 4OO TRANSMISSIONDescriptionThe Tu{bo ljydra-Matic 400 transmission is a fullyautomatic unit consisting primarily of a 3_element hydrau-lic torque convetter and a compound planetary gear set

Three mltltiple-disc clutches, one sprag unit, one rollerclutch and two bands provide the ftiction elements

required to place and keep the transmission in the propergear.

!xtetndl .ontrol (onneclion\ lo lran\mission are

MANIIAL LINKAGE - To select the desired operatingrange.

ENGINE VACUUM To operate a vacuum modulatorLlnit.

ELECTRICAL SIGNAL To operate an electrical detentsolenoid.

A vacuum modulator is used to automatically sense anychange in the torque input to the transmission Thevacuum modulator transmits this signal to the pressurc

regulator for line pressure control, to the l-2 accumulatorva1ve. and to the shift valves so that all torque require_

ments of the transmission are met and smooth shifts are

obtained at all throttle openings.

The detent solenoid is activated by an electric switch onthe carburetor or accelerator iinkage When the throttle is

fuliy opened, the switch on the carburetor is closed,

activating the detent solenoid and causing the trans-mission to downshift at speeds below approximately ?0MPH.

N, D, L2, L1, (P, R, N, 3, 2, 1).

P. Park position locks the output shaft to thetransmission case by means of a locking pawl. The enginemay be started in Park position.

R. - Reverse enables the car to be operated in a reverse

dilection.

N. Nelltral position enables the engine to be staited andrun without ddving the car.

3-D. Drive Range is used for all normal drivingconditions and maximum economy. Drive Range has threegear ratios, from the starting ratio to direct driveDownshifts are available by depressing the accelerator tothe floor.

2-L2.-L2 Range has the same starting ratio as Drive Range,

but prevents the transmission from shifting to third speed,

to retain second speed acceleration when extra perform-anoe is desired. L2 Range can also be used for enginebreaking. L2 Range can be selected at any car speed, and

the transmission will shift to second geal and remain insecond until the car speed or the throttle are changed toobtain first gear operation in the same inanner as in D.

Range.

I-Ll.-Ll Range can be selected at any vehicle speed, and

the transmission will shift to second gear and lemain insecond until vehicle speed is reduced to approximately 40

MPH, depending on axle ratio. L1 Range position prevents

the transmission from shifting out of first gear-

DETENT SWITCHAdjustment procedurePull detent switch driver rearward until the hole in theswitch body aligns with hole in driver. Insert a.092 inchdiameter pin through the aligned holes to a depth of.10inches. This will hold driver in position. Loosen mountingbolt- Depress accelerator to W.O.T. position. With accel-erator pedal in this position ,nove switch forward untilddver contacts accelerator lever. Tighten mounting bolt.Remove piI1.

Transmission IluidTransmission fluid level should be checked with trans-mission warm and selector lever in "P" Park position,every time cngine oil level is checked.

Fluid checking procedureTo deterrnine proper fluid level, procced as follows: with

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ihc lrrnsnlission hot {alter vehicle has beerl drivcn at loasi15 Eriles), the fluitl lcvel shouLd be between the "FULL"nrerk and 1/4 inch below FULL. Ihe vehiclc should bele\Jei with the engirle idling and thc transmission in PARK.

lf the vehicle has not been driven sufficiently to bdng thetransnlission up to operating tenperature, the fluid lcvo1should bc chccked as follows: Apply the parking brake,pul the selcctor lcver in PAI{K, and start the engine. DoNol Race the Engi e. I{ove thc selcctor lcver throLlghcach range. Immediately check the fluid level with thcsclcctor lever in the PARK position. Ihe engine should berunnirlg at a slow idle and the vehicle should be leve1. Thefluid lcvcl on thc dipstick should be between the "ADD"mark and 1/4 inch below. If additional fluid is required,add sufficierlt fluid to bring the lcvcl to l/,1 inch belowrh€ "ADD" mark on the dipstick. If the lranslnission fluidlevel can be correctly established at roorr temperatule(E0 f.) as described. when thc transmission reachesnonral operating lemperature, the fluid level will appearal rhe "FULL" mark. The fluid level is set at I,/z+ inchbelow the "ADD" mark on tho dipstick io allow lorexpansion of the fluid whjch occurs as thc transmissiontenlperature rises to its normal operating point of 180'F.I)O NOT OVERFILL, as foaming and loss of fluidthrough the vent pipe might occur as fluid heats up. lffluid is too low, cspecially when Cold, complete loss ofdrive may result which can cause transmission failure,

Fluid level indicatorThe fluid level indicator is located in lhe filler pipc at theright rcar corner of the engine.'to brirlg the fluid lcvcliiorn the add mark to the full mark add 1 pint. Fluid levelshoLrld be to the full mark with transrnission at normaloperating tenperature. With cold fluid the level shoLtld beapproximately I /4" below the add mark.

Neutral saJety switch adjustmentThc neutral safety switch must be adjusted so that the carwill start in the park or neutral position, but will not startin the other positions.

Draining and refilling transmissionDrain oii immediately after operation before it has had anopportunity to cool- To drain oi1 raise car on hoist orplace on jack stands, and provide containcr to collectd.aining fluid. Ren1ove oil pan and gasket. Discard gasket.Drain fluid from oil pan. Clean pan with solvent and drythoroughly with clean compressed air. Remove filter.Remove and discard oil filter to case o-ring. Install new oilfiLter to case o-ring. lnstail filter assembly. Install newgasket on oil pan and install pan. Tighten attaching boltsto l2 lb- ft- Lower car and add 5 pints of transmissionfluid through filler tube. with nlanual control lever inI'ark position, start engine. DO NOT R,{CE ENGINE.N'love manual control lever through each range. Immediately check fiuid level with sclector lever in Park, enginerunning, and vehicle on LEVEL surface. Add additionalfluid to bring level to 1/.+" below the "ADD" mark on thedipstick.

PR ESSURE REGULATOR VALVERemovalRernove botto pall and filtcr. Clomprcss rcgulator boost

{ valve bushing against pressure regulator spdng and renovesnap ring, usirlg J-5,103 pliers. Remove reglllator boostvalve bushing and valve. Remove plessurc regulator spdng,


Renrove regulator vrlvc, sprjng reteiner, and spa!.cr(s) ifprcsent.

lnstallationInstallation of thc prcssure regulator valve is the reverse oftho rcmoval. Adjust oil 1eve].

CONTROL VALVE BODYRemovall{cmove bottom pan and filter. I)isconnect lead \\,irc fropressure switch assembly. Rerr)ove control valve bod)'attaching scrcws and detent roller spring asscmbly. Do notremove solenoid attaching sorc$s. Re ove control valvebody assembly and goverrlor pipes. If care is taken inre oving control valve body the six (6) check balls willstay in place above the spaccr plate. Do not drop nlanualvalr,e. Remove the govclnor pipes and manual valve fromcontrol valve body.

lnstallationlnslallation of the co trol valve bodv is thc rcvcNc of theremoval. Adjust oil level.

GOVERNORIf difliclrlty is encountcrcC when renroving the governorassembly, it may be necessary to remove thc oil pan andwithdralv the govcrnor pipes (approximatcly 1,/8") to fleegovernor assembly.

RemovalRemove governor cover attaching screws, covet, andgasket. Discard gasket. Withdraw governor assembly fronr

lnstallationInstallation of the governor assembly is the reverse of thercnoval. Use a new gasket under the governor cover.Adjust oil 1evel.

MODULATOR AND MODULATOR VALVERemovalRemove modulator assembly attaching screw and tetainer.Remove modulator assembly from case. Discard "o" dngseal. Relnove Modulator valve lrom case.

lnstallationInstallation of thc modulator assembly and modulatorvalve is the reverse of the removal. Use a new "O" ringseal on the modulator assembly. Adjust oil l€vcl.

PARKING LIN KAGERemovalRemove bottom pan and oil filter. Unthread jam nutholding detent lever to manual shaft. Remove manualshaft rctaining pin from case. Remove anual shaft andjam nut fronr case. DO NOT remove manual shaft sealunless replacement is requircd. Remove parking lctuatorrod and detent lcver assembly. Remove parking pawlbrackct attaching screws and bracket. Remove parkingpawl return sprirlg.

The following shoulLl not be complcted unlcss partrephcernenl is rcquircd. Rclllovc parking prwl shaf!retaincr'. RcJnovc parki.g pawl shaft, cup plug, parkjngpawl shaft. and parkirlg pawl.


lnslallationInstallation ol the parking linkage is the reverse of theremoval. Use new seal and cup plug, if removed, and newbottom pan gasket. Adjust oil level.

REAR SEA LRemovalRemove propeller shaft. Pry seal out with screw driver orsmall chisel.

lnstallationAll Models except "CP", use a non hardening sealer onoutside of seal body; and using Tool J-213 59, drive seal inptace. Model "CP", use a non-hardening sealcr on outsideof seat body;and using Tool J-2146'+, drive seal in place

Re-instatl propeller shaft.

TRANSMISSION REPLACEMENTBefore raisjng the car, disconnect the negative battelycable and release the parking brake. Place car on hojst'Remove propeller shaft. Disconnect speedometer cable,

eiect cal lead to casc connector, vacuum line modulator,and oil cooler pipes. Disconnect shift control linkage

Support transmission with suitable transmission jack'

Disconnect tear mount frorn frarne crossmembet. Remove

two bolts at each enil of framc crossmember plus throughbolt at inside of fnme and parking brake pulley' Remove

crossmembel. Remove converter under pan Remove

converter to flywheel bolts Lower tmnsmission until jack

is barelv supporting it. Remove transmission to engine

mounting boits and rcmove oil filler tLlbe at transmission'Raise transmission to its noimal position, support engine

with jack an<1 slide transmission rearward from engine and

lowei it away from vehicle. Use convelter holding ToolJ-5384 when lowering transmission or keep rcar oftransmission lowel than front so as not to lose converter'

The installation of the transmission is the reverse of theremoval with the following added step. Before installingthe flex plate to converter bolts, make ce ain that the

weld nutj on the convelter are flush with the flex plate

and the convetter rotates frcely by hand in this position'

Then, hand start all three botts and tightcn finger tightbefore torqueing to specification. This will insure proper

converter alignment. After installation of transmission'

remove car flom hoist. Check linkage for proper adjust

ment.

TURBO HYDRA-MATIC 4OO DIAGNOSIS PROCEDUREIn the event of a major transmission failure, replace filterassembly, and flush oil cooler and cooler lines.

Accurate diagnosis of transmission problems begins with a

thoiough understanding of normal transmission operation.ln particular, knowing which units are involved in thevarious speeds or shifts so that the specific units orcircuits involved in the problem can be isolated andinvestigated fufther.

'lhe lollowing sequence, based on field expe ence, provides the desired information quickly and in most cases

actually oorects thc malfunction withoui requiring there oval of the transmission.

Check oil level and condition. Check a.d corect detentswitch. Check and cofiect vacuum line and fittings. Checkand correct manual linkage.

Oil level and condition checkAlways check the oil level before road testing. Oi1 must bevisible on dip stick p or to operating the vehicle. Erraticshifting, pump noise, or other malfunclions can in somecases be traced to improper oil level. tf oil level is low,refer to Oil Leaks. The condition of the oil is often an

indication of whether the tlansmission should be removedfrom the vehicle, or to make further tests. When checkingoil level. a burned smell and discoloration indicate burnedclutches or bands and the transmission will have to be

removed,.

Manual linkageManual linkage adjustment and the associated neutralsafety switch are important from a safety standpoint. Theneutral safety switch should be adjusted so that the enginewill start in the Park and Neutral positions only. With theselector lever in the Park position, the parking pawlshoutd freety engagc and prevent the vehicle from roiling.The pointer on the indicator quadmnt should line uppropeily with the range indicators in all ranges.

Oil leaksBefore attempting to coIIect an oil leak, the actual sourceof the leak must be determined. In many cases, the sourceof the leak can be deceiving due to "wind flow" aroundthe engine and transmission. The suspected area should be

wiped clean of all oil before inspecting for the source ofthe leak. Red dye is used in the transmission oil at theassembly plant and wiii indicate if the oil leak is from thetmnsmission. The use of a "black lighi" to identify the oilat the source of the leak is also helpful. Comparing the oi1

from the leak to that on the engine or tiansmission dipstick (when viewed by black light) will determine thesource of the leak.

Oil leaks around the engine and transmission are genelallycarried toward the rear of the car by the air stream. Forexample, a tmnsmission "oil filler tube to case leak" willsometimes appear as a leak at the rear of the transmission.ln determining the source of an oil leak it is most helpfulto keep the engine running.

Possible points of oil leaksTransmission Oil Pan Leak: Attaching bolts not corectlytorqued. Improperly installed or damaged pan gasket. Oilpan gasket mounting face not flat.

Rear Extension Leak: Attaching bolts not cofiectlytorqued. Rear seal assembly damaged or improperlyinstalled. Gasket seal (extension to case) damaged orimproperly installed. Porous casting.

Case Leak: Fillei pipe "O" ng seal damaged or missing;misposition of filler pipe bmcket to engine "loading"one side of "O" ring. Modulator assembly "O" dng seal -danlaged or improperly installed. Governor cover, gask€tand bolts damaged, loose;case face leak. Speedo gear

"O" ring damaged. Manual shaft seal damaged, improp- ral

erly installed. Line pressure tap plug stripped, shy sealer

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AUTOMATIC TRANSIVIISSION 84_25

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compound. Parking pawl shaft cup pirLg _ dan]aged,improlcrly installed. Vcnt pipe. poroLrs case.

Front End Leak: Froni seal daJnalled (check converter'., k 'ur rr. k-. e.... Jlso o- pLrrp bJch.ng .r o\cd'orw l'rll: j d (r .or'Ic .t.i.\,ng truT purrp to con\erle,scal. Pun)p attaching bolts and seals dairaged, rnissing,bolts loosc. Convcrter leak jn weld. pump ,,O,, seat l'danaged. (Also chcck pump groove and case borc.)Porous casting (pump or case).

Oil Comes Out Vent Pipe, Transntission over_filled. Waterin oi1. Purnp to case gasket mispositioned. Foreignnaterial betwecn pump and casc, or betwecn pump co;rrnd bod-y. Case porous, pump face improperly ma-chined. Pump shy of stock on mounting faces, poror,scasting.

Case porosity - repairT'Jn,nlt,,ion eJk\ cdu\eo b! dlurni,tum , d\c poru\iryheve been successfully rcpaired with the transn ssion inthc vehicie. Road test and bdng re transmission tooperating temperature. Raise the car end, with the engine

Lnning, locate the source of the oil leak. Chcck for leaksjn all operating positions. The use of a mirror wiil behelpful in finding leaks. Shut off engine and thoroughly.leun drL.a w h r rolrenr rnd dLr dry I \rng rhe rn"rru,ironol the manulJctLrrer, mix a \u r(icnr amounl ot epor!cenent, part #1360016, to make the repair. Whil; th;transmission is still hot, apply the epoxy to the area,naking cedain_that the area is fully covered. Ailow epoxycement to dry for three houls and retest for leaks.

OIL PR ESSUR E CHECKWith car stationaryOii Pressure Check Road or Normal: Operating Con,ditions While road testing with the transrnissin oilpressure gauge attached and the vacuum modulator tubeconnected, the transnlission pressures should check approximately as shown on chart. Transmission oil pressuregauge and enginc tacholneter shouid be connected and theoil pressures should check as follows: pressures indioatedbelow are 0 output speed with the vacuum modulatortube disconn€cted and with engine at 1200 rpm. pressuresindicated below are with the vacuum tube connected fornormal modulator operation, and with the engine atapprox. 1000 rpm. Paessures are not significan y alfectedby altitude or barometric pressure when the vecuLrm tubeis connecied.

THRE,ADED SCREW SEAL

VACUUM CONNECTORCRIMPED UPPER TO TOWERHOUSING SEAM

VACUUM MODU LATORassemblyAfter thorough investigation of field retum modulatorassemblies, it has been found that over 50% of the partsreturned as defective were good. For this rcason. thefollowing procedure is recommended for checking iurboHydra Matic .100 modulator assemblies in the fieli beforercphcement is accomplished.

Vacuum modulator asse mhh,

Vacuum diaphragm leak checklnsert a pipe cleaner into the vacuum connector pipe aslar r. po,sil-lc dnJ ihejk for lhe prc\en(( ot {ran\mr.sionoil. lt nrl r. lound. rcpla''c thc noJLIdror. Ld.olinc orwater vapor may settie in the vacuum side of themodulator. If this is found without the presence of oillthe modulator should not be changed.

Atmospheric leak checkApply a iibcral coating of soap bubble solution to thevacuum connector pipe seam, the c mped upper to lower

(t or 2)Ddve, Neutral, Park L1 or L2

60 150Reverse

10'7

Steady road load at approximately 25 mph

Selector Lever position

Drive, Zero" throltle ro rull rhrotrlerl

Drive Range, Zero Throt e at 30 mphRev. (Zero to fult throt e)

L2 -2nci Gear

Gear

1st2nd3rd

3rd

145 psi

Mrnimum

Minimum Maximum

150

260

155 psi

Maximum

60

6095

AUTOIVIATIC TRANSMISSION 84_26

housing seam, and the threaded screw sea1. Using a shortpiece of rubber tubing, apply air pressure to the vacuumpipe by blowing into the tube and observe for leakbubbles. Il bubbles appear, rcplace the modulator. Do notuse any method other than human lung power forappiying air pressure, as pressures over 6 psi may damagethe modulator.

Bellows comparison checkUsing a comparisoq gauge, compare the load of a knowngood Ilydra Matic modulator with the assembly in ques-tion. Install the modulator that is known to be acceptableon either end of the gauge. Install the nrodlllator inquestion on the opposite end ol the gaugE. llolding themodulator, n a hori/onral po.irion, bring rhem rogcrhcrunder pressure until either modulator sleeve end justtouches the line in the center of the gauge. -fhe gap

between the opposite modulator sleeve end and the gaDgeline should then be I /16" or less. If the distance is greaterthan this amount, thc modulator in question should bereplaced.

Bellows compdtison gauge

Sleeve alignment checkRoll the main body of the modulator on a flat surface andobse e the sleeve for concent city to the cam. If thesleeve is concent.ic and the plungcr is free, the modulatoris acceptable. Once the moduiator assembly passes all ofthe above tests, it is an acceptabl€ part and should bere-used,

Pressure switch checkThe pressure switch in the Turbo llydra-Matic 400transnission may be easily chccked with a continuitytester which uses cither the vchicle's battery ot a sepamtesource to power the test lamp ot meter. To prcventdamaging the pressurc switch. the tester used must havesufficient resistance that is does not supply the switchwith more than .8 amp of cutrent at 12 volts. Test lampswhich use size 1893 or smallet bulb, will not damage theswitch.

Disconnect electdcal wire harness f.om transmissionelectrical connector. If using a coltinuity tester which hasa self contained powet source, connect one tester lcad topressuae switch tetminal of taansmission connector. andconnect other lead to ground. Tester should show curentflowing through the switch (switch closed). If the vehicle'sbattery is to be used to power a simple light bulb typetester, connect one lamp lead to pressure switch terminalof transmission connector and connect othcr lead to ,

"llot" lerminal of the vehicle's wi ng hamess. Check thatvehicle's battery cables are connected.

Set parking brake, appiy seflice brakes, stat engine andlet it idle. Move transmission selector to "Drive" andtester should show curent flowing through switch toground (switch closed). With brakes still applicd. movetransmission selector to "Reverse" which supplies trans-mission oil pressure to pressure switch and tester shouldshow curent flowing through switch to ground (switchopen). If above test indicates a defective pressure switchcircuit, the transmission bottom pan must be removed toservice the pressure switch or lead whe assembly.

FLOOR SHIFT CAB LECheck operationlf adjustment is required, loosen nut so that pin moves insiot of transmission lever and remove floor console cover.Move transmission lever countcrclockwise to;ts maximumposition and then clockwise five (5.) detent positions(park). Position shift lever in park (P) position and inse.t a

.040 inch spacer forward of pawl and tighten nut to 20pound feet. With shift lever in park (P) position, positionignition switch to "Lock" posltion. Remove backdrivecable cotter pin and washer at column lever and dis-connect cable from lever retaining pin.

From insjde vehicle, loosen the two nuts at the stee.ingcolumn to-dash brackct. Rotate thc lock tube levercounterclockwise (viewed from front of column) toremove any free play from the column. Reposition thebracket until the cabie eye passes freely over the retainingpin on the bracket. Holding the bracket in position, havean assistant tighten the bracket retaining nuts inside thevehicle. Reinstali the cotter pin and washer retaining thecable to the iever retaining pin.

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VIEW B

SHIFT LEVER IN"FARK" POSITION

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l'bot shilt cable adjustment

TRANS'UIISSION, AUTOMATIC 8A...TRANS'UIISSION, AUTOMATIC TRANSMISSION 8A_1 AUTOMATIC 8A INDEX...

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Transcript of TRANS'UIISSION, AUTOMATIC 8A...TRANS'UIISSION, AUTOMATIC TRANSMISSION 8A_1 AUTOMATIC 8A INDEX...