07 -Propeller and Rear Axle

PROPELLER SHAFT AND REAR AXLE

GENERAL DESCRIPTION

The standarddifferential carrier assembly usedon 1963, 60 and 62 series Cadillac cars is shownin Fig. 7-1. A controlled type differential isavailable as an option on all 1963 model cars.

A double lip rear axle pinion oil sealis usedonboth type differential carriers. The flangelesstype sealcaseis of one piece constructionand thedouble lip feature provides a better seal to keepdirt and water awayfrom the oil sealing member.

A flange is used at the forward endof the rearaxle pinion on both the standard and controlleddifferential carrier assemblieson all 60 and 62series cars. A conventionalpinion yoke is usedatthe forward endof differential carrier assemblieson Seventy-Five series cars and commercialchassis. Aside from this, thedifferential carrierassembliesare basically the same on all seriescars.

Rear Axle

The rear axle gear ratios used on thedifferentseries cars provide maximum performance andeconomyfor eachseries. The 2.94-1 ratio is usedon all 60 and 62 series, except Air Conditionedcars which use the 3.21-1 ratio. The 3.21-1 ratiois also offered as an option on 60 and 62 seriescars not equipped with an Air Conditioner. The

3.36-1 ratio is used on all Seventy-Five seriescars and the 3.77-1 ratio is used on the commercial chassis, as well as being optional onSeventy-Fiveseries cars.

Greased and sealed rear wheel bearings areused on all 60, 62, and Seventy-Fiveseriescars.The bearings are sealed on the outer side by arubber grease seal that is an integral part of thebearing. The inner oil seal, however, can beserviced separately from the bearing. The rearwheel bearings require no adjustmentor periodiclubrication. Sealingbetweenthe outer diameter ofthe bearingand inner diameter of the axle housingis accomplishedby an 0-ring seal that should bereplaced whenever the axle shaft is removed.

Rear wheel bearingson the commercial chassisare sealed on both sides by greasesealsthat arelubricated by an initial grease packing. An additional inner shaft seal prevents differentiallubricant from entering the bearings and brakeassembly. Whenevera rear axle shaft oil seal isremoved,a new oil seal must be installed.

Propeller ShaftPower is transmitted from the transmissionto

the rear axle assembly by a two-piece propellershaft. The propeller shaft assemblyused on all

7-1

Pinion Flange

-* Pinion Oil Seal

Tapered RollerBearings

Lubricant Passageto Front Bearings

Differential Side Gear

Greased and Sealed Wheel Bearing

Rener

Tapered Roller Bearings

Oil Seai/U.

0" Ring Seal

Fig. 7-1 Differential Carrier and Rear Axle Assembly 60 and 62 series cars


1963, 60 and 62 series cars, Fig. 7-2, incorporates two constant velocity type universal jointassemblies -- one in the center and one at therear, and a standarduniversal joint at the front.The propeller shaft assembly is attachedto therear axle by meansof a doubleflange connection.A flange on the rear universal joint attachesto aflange on the rear axle pinion by four screwsandlockwashers.

The constantvelocity universal joint assemblyconsists of two single joints connected with aspecial link yoke. A center ball and socket between the joints maintains the relative position ofthe two units. This center ball causeseachof thetwo units to operate through exactly one half ofthe complete angle between the front and rearpropeller shafts, and the rear propeller shaft andaxle.

Propeller shafts with constant velocity typeuniversal joints are serviced as an assembly.However, the front standarduniversal joint, thecenter bearing, and thecenterbearingsupportandits related parts can be serviced separately.

The propeller shaft assemblyused on Seventy-Five series cars and thecommercial chassisincorporates standarduniversal joints at each endand in the center. The propeller shaft is attachedto the rear axle by two "U" bolts, locks, and nutsthat attachthe rear universal joint cross bearingsto theyoke on therear axle pinion.

Universal joints used on 1963 Cadillac carscannot be repacked. On original universal joints,

the injected nylon ring used to retain the bearingcup in the yoke will shear off when bearing is removed. There are no provisions for replacing thenylon ring other than installing a new universaljoint. The only time disassemblyis recommended,is when a joint becomesloose, worn or noisy, andthen the joint assemblyshould be replaced.

On all series cars, the propeller shaft is supported in the center by a center bearingsupportand bracket assembly located in the frame tunnelsection. The center bearing support is somewhatshorteron 60 and62 seriescars.

A splined slip yoke is used on the front endofthe rear section of the propeller shaft on allseries cars. The yoke fits into a splined couplingin the rear end of the front sectionof the propeller shaft. This slip spline permits the slightlengthening and shortening of the propeller shaftrequired by the movement of the rear axle.

Controlled Differential

The basic advantageof the optional ControlledDifferential over the standarddifferential is thatthe major driving force is always directed to thewheel having the greater traction. The unit is nota positive lock type. It will releasebefore an excessiveamount of torque is directed to one rearwheel.

The main purpose of the Controlled Differentialis to reducethepossibility of the car getting stuckwhile driving under slippery conditions. It alsominimizes wheel spin and resultant drive lineshock when accelerating on an uneven roadsurface.

7-2

Transmission Front Slip Universal Front PropellerYoke Joint Shaft

Center Bearing Support Lockand Bracket Assembly

Center Slip Yoke Seal

Fig. 7-2 Propeller Shaft Disassembled 60 and 62 series cars


During normal driving and cornering, the Controlled Differential unit functions as a standarddifferential. When one wheel encountersa slippery surface, however, theControlled Differentialallows the wheel with the greater traction to drivethe car.

Wheelspin can occur if over-acceleration isattempted. However, the major driving force willstill be directedto theother wheel. This conditiondoes not indicate failure of the unit.

When checking the runout of rear wheels oncars equipped with a Controlled Differential, be

sure to raise both rear wheels off the ground.Otherwise, the wheel in contact with the groundwill drive when the opposite wheel is raised androtated.

Cars equippedwith the Controlled Differentialshould use only the special lubricant availablefrom factory Parts Warehousesto assure satisfactory operation of this unit.

All service information in this section appliesto the controlled as well as the standarddifferential carrier assemblies,unlessotherwisenoted.Both of these differentials are serviced asassemblies.

SERVICE INFORMATION

1. Rear Axle Gear Ratio Identification

The gear ratio of the rear axle assembly on1963 series Cadillac cars can be determined byan identification number stampedon the front faceof the carrier assembly at the end of the oil return passage,Fig. 1-1.

In the case of a controlled differential, theletter "G" precedes the axle ratio identificationnumber. For example; "G2" is a controlled differential with a rear axle gear ratio of 2.94-1.

The serial number of thedifferential carrier isstampedon thebottom of the carrier on the flangeadjacentto the rear axle housing.

The gear ratios and correspondingidentificationnumbers for the various series are as follows:

IdentificationSeries Ratio Number*

1963 - 60 & 62 series 2.94-1 2exceptcars equippedwith an Air Conditioner

1963 - 60 & 62 series 3.21-1 1cars when equippedwith an Air Conditioner.optional on all 60 & 62series cars

1963 - 75 series cars 3.36-1 6

1963 - Commercial 3.77-1 7ChassisOptional on75 series cars

*Letter "G" precedingthe identification numberindicates a controlled differential.

2. Rear Axle Pinion Flange and Oil SealRemoval and Installation 60and 62 Series

When replacing the rear axle pinion flange oroil seal, follow the procedure outlined below.Failure to do so may result in overloadedpinionbearingsor drive pinion endplay.

a. Removal

1. Raise rear endof car, andremoveboth rearwheels and brake drums to eliminate drag whenmeasuringtorque readings.

2. Disconnect rear universal joint from pinionflange.

3. Using a 0-100 inch-pound torque wrench,with Socket, J-2571-l, and Adapter, J-257l-2,measure the inch-pounds torque required to rotate the pinion shaft slowly for at least 2 turns,Fig. 7-3. Recordtorque reading.

7-3

Fig. 7-3 Checking Pinion Shaft Pre-load Torque60 and 62 series cars


4. Install Adapters, J-21044 on pinion flangeand install Pinfon Flange Holding Tool, J-8614-l,with raised side of tool against adaptersandsecure wirh two attachingbolts.

5. Install Socket, J-2571-l, on pinion nutthrough hole in Holding Tool and -remove nut,using 3/4 inch drive socket wrench.

6. Remove washer from pinion shaft andmarkpinion shaft and flange so that flange can be installed in same position on spline.

7. Install Rear Axle Pinion FlangeJ-8614-2, through hole in Holding Tool,puller 45 ° and remove pinion flange fromshaft, Fig. 7-4.

8. Pry out pinion oil seal.

9. Removestaking burrs on pinion shaft threadswith a small file or a 7/8 inch x 14 threaddie.

Puller,index

pinion

b. Installation

1. Position oil seal in carrier. Place Oil SealInstaller, J-2l1l3, against seal and secure tooland seal with pinion nut andwasher.

2. Install Pinion Nut Socket,J-2571-l, on pinionnut and press oil seal into carrier by tighteningpinion nut with socket, Fig. 7-5, until InstallerTool bottomson face of carrier.

3. Remove Pinion Nut Socket, pinion nut andwasher,and Oil SealInstaller.

CAUTION: - Make certain that sealsurfaceofflange is free from scratches or nicks. Ifnecessary,clean with No. 400 grit "wet" paperand kerosene. Use only a circular motion whensandingseal surfaceof flange so as not to leaveany spiraled marks on seal surface.

4. Install flange on pinion shaft splines withalignment marks lined up.

5. Install washer and new pinion nut on pinionshaft.

6. Install Adapters, J-21044, on pinion flangeand install Pinion Flange Holding Tool, J-8614-l,on adapters with raised side of tool againstadapters. Secure with two attaching bolts.

7. Install Socket, J-2571-l, on pinion nutthrough hole in Holding Tool andtighten nut using3/4 inch drive socket wrench, Fig. 7-6, untilproper pre-load of bearing is attained.

NOTE: Proper pre-load of bearing isattained when torque required to rotate pinionshaft is from 2 to 5 inch-pounds greater thanthe torque recorded in Step 3 of the removalprocedure. It will be necessary to removeHolding Tool and drive socket wrench in order

7-4

Fig. 7-4 Removing Pinion Flange

Fig. 7-6 Tightening Pinion Nut60 and 62 Series carsFig. 7-5 Installing Pinion 00 Seal


to install 0-100 inch-pound torque wrench andAdapter, J-257l-2, to check torque required torotate pinion shaft, Fig. 7-3.

If torque is low, tighten pinion nut slightly andagain measurethe inch-poundstorquerequired torotate pinion shaft. Repeatthis operation, tightening the nut slightly each time, until specifiedtorque is obtained. It will require approximately200 foot-pounds torque on pinion nut to obtainproper bearing pre-load.

CAUTION: Do not overtighten, and neverback off on the nut to reduce pre-load torque.The average torque on an assembly with over1,000 miles is between15 and 20 inch-pounds.The torque on a new assembly is approximately50 inch-pounds.

8. Remove Holding Tool Adapters, J-2l044,from flange.

9. Stake pinion shaft into nut.

10. Connect rear universal joint to pinionflange. Apply parking brake to preventpropellershaft from turning and install four screws andlock washers,tightening screwsto 65 foot-pounds.

CAUTION: Do not use a pry bar or heavytool to hold propeller shaft when tighteningflange attaching screws, otherwise universaljoint bearingseals will becomedamaged.

correct level as de4. Use only the specialfactory Parts Ware-

with a Controlled Dif

12. Reinstall brake drums and rear wheels, andlower car.

3. Rear Axle Pinion Yoke and Oil SealRemoval and Installation 75 Seriesand Commercial Chassis

When replacing the rear axle pinion yoke or oilseal, follow the procedureoutlined below. Failureto do so may result in overloadedpinion bearingsor drive pinion end play.

a. Removal

1. Raise rear endof car, and removeboth rearwheels and brake drums to eliminate drag whenmeasuring torque readings.

2. Disconnect rear universal joint from pinionyoke.

3. Using a 0-100 inch-pound torque wrench,with Socket, J-2571-1, and Adapter, J-2571-2,measure inch-pounds torque required to rotatepinion shaft slowly for at least 2 turns, Fig. 7-7.Recordthe torque reading.

11. Refill rear axle toscribed in Section 2, Notelubricant available fromhouses for cars equippedferential.

Fig. 7-7 Checking Pinion Shaft Pre-Load Torque75 series cars and commercial chassis

4. Install Pinion Yoke Holding Tool, J-6544,onyoke and install two attaching nuts.

5. Install Socket, J-257l-l, on pinion nutthrough hole in Holding Tool and remove nut,using 3/4 inch drive socketwrench.

6. Remove washer from pinion shaft and markpinion shaft and yoke with a punch so that yoke canbe installed in same position on spline.

7. Remove pinion yoke from pinion shaft usingPuller, J-6295-Ol, Fig. 7-8.

8. Pry out pinion oil seal.

9. Removestaking burrs on pinion shaft threadswith a small file or a 7/8 inch x 14 thread die.

Fig. 7-8 Removing Pinion Yoke

7-6 PROPELLER SHAFT AND REAR AXLE

b. Installation

1. Position oil seal in carrier.Oil Seal Installer, J-21ll3, againstcure tool and seal with pinion nut

Place Pinionseal and Se-

and washer.

10. Refill rear axle to correct level as described in Section 2, Note 4. Use only speciallubricant available from factory Parts Warehouses for cars equipped with a Controlled Differential.

2. Install Pinion Nut Socket, J-2571-1, on pinion nut and pressoil seal into carrier by tightening pinion nut with socketwrench, Fig. 7-5, untilInstaller Tool bottoms on face of carrier.

3. Remove Pinion Nut Socket, pinion nut andwasher, and Oil Seal Installer.

CAUTION: Make certain that sealsurface ofyoke is free from scratches or nicks. Ifnecessary,clean with No. 400 grit "wet" paperand kerosene. Use only a circular motion whensandingseal surface of yoke so as not to leaveany spiraled marks on seal surface.

4. Install yoke on pinion shaft splines withpunch marks lined up.

5. Install washer and new pinion nut on pinionshaft.

6. Install Pinion Yoke Holding Tool, J-6544,onyoke and install two attaching nuts.

7. Install Socket, J-2571-1, on pinion nutthrough hole in Holding Tool andtighten nut, using3/4 inch drive socket wrench, until proper preload of bearingis attained.

NOTE: Proper pre-load of bearing is attained when torque required to rotate pinionshaft is from 2 to 5 inch-pounds greater thanthe torque recorded in Step 3 of the removalprocedure. It will be necessary to removeHolding Tool and drive socket wrench in orderto install 0-100 inch-pound torque wrench andAdapter, J-257l-2, to check torquerequired torotate pinion shaft, Fig. 7-7.

If torque is low, tighten pinion nut slightly andagain measureinch-poundstorquerequired to rotate pinion shaft. Repeatthis operation, tighteningthe nut slightly each time, until specified torqueis obtained. It will require approximately 200foot-pounds torque on pinion nut to obtain properbearing pre-load.

CAUTION: Do not overtighten, and neverback off on the nut to reduce pre-load torque.The average torque on an assembly with over1,000 miles is between 15 and 20 inch-pounds.The torque on a new assemblyis approximately50 inch-pounds.

8. Stake pinion shaft into nut.

9. Connect rear universal joint to pinion yoke.Install "U" bolts, locks, andnuts, tightening nutsto 15 foot-pounds.

11. Reinstall brake drums and rear wheels, andlower car.

4. Rear Axle Backlash Measurement

1. Place car on hoist.

2. To prevent rotation of pinion flange or yoke,use corresponding holding tool, and clamp toolhandle to lower control link.

3. Pull parking brake cable on one wheel toprevent wheel from turning. This is not necessary on cars equippedwith a Controlled Differential.

4. Measure rotation backlash of oppositewheel in inches at outer circumference of tiretread. A stiff wire pointer fastenedto the fenderor car frame will aid in this measurement.Maximum backlash under this condition should not exceed 1/2 inch on standarddifferentials and 1/8inch on Controlled Differentials.

5. Rear Wheel and Brake DrumRemoval and Installation

a. Removal

1. Raise rear end of car, place jack standsunder rear frame rails, and removewheel.

2. Remove two screws holding brake drum toaxle shaft flange. For commercial chassis,seeNote 7a.

3. Remove brake drum.

b. Installation

1. Install brake drum on rear axle shaft flangeand securewith two screws.

2. Install wheel and replace wheel mountingnuts, tightening to 105 foot-pounds. For commercial chassissee Note 7b.

3. Remove jack stands and lower car.

6. Axle Shaft, Bearing Oil Seal, andWheel Bearing Removal andInstallation Fig. 7-9 ExceptCommercial Chassis

a. Removal of Axle Shaft and Bearing Assembly

1. Raise rear end of car and removewheel andbrake drum as describedin Note 5a.


Fig. 7-9 Rear Wheel Disassembled

2. Remove four nuts and lock washersthat holdcover, gasket, and backing plate to rear axlehousing.

3. Install Axle Shaft Puller, J-8l31, on studs ofrear axle shaft flange and install Slide HammerAssembly, J-2619, in Puller, Fig. 7-10.

4. Drive outward with slide hammer to removeaxle shaft assembly. Remove and discard covergasket.

b. Replacing Rear Wheel Bearing Oil Seal

1. Using a cold chisel and hammer,notch bearing retainer next to bearing, beingcareful not todamagehearing.

NOTE: BearingDrive chisel intocan be slipped off

retainer need not be split.retainer only until retainershaft, then removeretainer.

2. Wipe shaft and bearing clean.

3. Remove oil seal from bearing using OilSeal Remover, J-2l010, Fig. 7-11. Hook slottedflange of remover tool under rolled edge of sealcase and pry up on tool handle. Then slide sealoff axle shaft.

NOTE: If bearinggreasehasbeendiluted byaxle oil, drain and wipe out oil.

4. Squeezecontents of tube of wheel bearinggrease included in seal replacementkit inside thebearing. Also apply a thin film of greasearoundlip of seal.

5. Install new oil seal on axle shaft with springside of seal toward splined end of shaft. Position

Bolt Flange Gasket

Adjuster Link

7-7

Wheel Cylinder

I Brake Shoe

Axle /Backing Plate

Adjuster Actuator

‘0" Ring Cover Wheel Mounting Bolt

IPawl Bearing

Bearing

Flanged Axle

//

Brake Drum

Fig. 7-10 Removing Rear Axle Shaft Fig. 7-1 1 Removing Oil Seal From Bearing


seal in bearing and press sealinto bearingusingOil Seal Installer, J-2l011, as a slide hammer,Fig. 7-12, until seal is flush with top of bearing.

NOTE: Seal may also be installed by lettinginstaller tool slide down axle shaft under itsown weight.

6. Install new bearing retainer on axle shaft.Insert axle shaft through ring of Bearing Installer,J-6257, and "U" shapedpiece of Bearing Plateand Pin Assembly, J-2986-l, and place on arborpress.

7. Press shaft through retainer until retainerjust contacts bearing. Remove shaft assemblyfrom installer tools.

c. Replacing Rear Wheel Bearingand Seal Assembly

1. Using a cold chisel andhammer,notchbearing retainer next to bearing.

NOTE: Bearing retainer need not be split.Drive chisel into retainer only until retainercan be slipped off shaft, then remove retainer.

2. Place rear axle shaft and bearingassemblyin "U" shapedpiece of Rear Wheel Bearing Plateand Pin Assembly, J-2986-l, and position on arborpress.

CAUTION: Make certain that axle shaftflange is properly centered in arbor pressandfree from any obstructions.

3. Install Rear Wheel Bearing Holding Tool,J-2986-3, around bearing and over dowels, Fig.7-13.

CAUTION: Step 3 must be performed to decrease danger of bearingexploding while underarbor press load.

4. Press axle shaft through bearingand removebearing.

NOTE: If rear wheel hearing has been removed becauseof failure, inspect axle housingand differential carrier for metal chips, andclean thoroughly if necessary.

5. Inspect cover for damage. Replaceif necessary.

7-8

Fig. 7-12 Installing Oil Seal In Bearing

Fig. 7-13 Removing and Installing Rear Wheel Bearing

PROPELLER SHAFT AND REAR AXLE 7-9

6. Install new wheel bearingand seal assembly and brake drum assembly off shaft. Use a five-

on shaft so that 0-ring groove is toward splined jaw puller, to reducethe possibility of warping or

end of axle shaft, distorting the brake drum.

7. Insert axle shft through ring of bearing In- 4. Remove seven screws and lock washersthat

staller, J-6257, and "U" shapedpiece of Bearing hold bearing retainer and backing plate to axle

Plate and Pin Assembly, J-2986-l, and place on housing flange.

arbor press, Fig. 7-13.5. Remove key from end of axle shaft and re

8. Press bearing on shaft so that there is move bearing retainer.

3-7/32 inch clearance betweenouter surface ofaxle shaft flange and inner end of wheel bearing

6. Pull axle shaft and bearing assembly from

inner race, Fig. 7-13.housing as a completeassembly. Be careful not todamageaxle shaft oil seal.

9. Releasearbor press and remove axle shaftfrom installer tools. b. Installation

10. Install new bearing retainer on axle shaft NOTE: Before installing axle shaft after an

and reinstall shaft on installer tools,oil seal has been replaced, inspect rear wheelbearing for loss of lubricant, since a leak in an

11. Press shaft through retainer until retainerold seal may permit differential lubricant to

just contacts bearing. Remove shaft from in-"wash out" grease in a sealed wheel bearing.

staller tools.A wheel bearing that spins freely indicates alack of grease, and should be replacedat same

d. installation of Axle Shaft and Bearing Assemblytime new oil seal is installed.

1. Apply film of differential lubricant to wheel 1. Install axle shaft and bearing assemblyinto

bearing bore in axle housing after checking for housing as a complete assembly. Be careful not

burrs and nicks, to damageaxle shaft oil seal.

2. Use a new gasketon coverand a new 0-ring2. Install bearing retainer and key on end of

seal on wheel bearing and install axle shaft beingshaft.

careful not to damage0-ring seal. 3. Install seven bolts and lock washersthat hold

NOTE: Whenever axle shaft is removed, bearing retainer andbacking plate to axle housing

always install a new 0-ring seal on wheelflange. Tighten bolts to 70 foot-pounds.

bearing. 4. Install wheel hub and brake drum assembly

3. Install four nuts and lock washerson rear Ofl shaft.

axle housing bolts, to hold cover, gasket, andbrake backing plate in place, and tighten by in- 5. Install new lock washer and retainingnut on

serting a socket wrench through large hole in endof axle shaft.

rear axle flange. Torque nuts to 40 foot-pounds. 6. Engage parking brake and tighten retaining

4. Install brake drum and two retaining screws, nut to 300 foot-pounds,then bend washeralong oneflat of nut.

5. Install wheel and lower car. Tighten wheelmounting nuts to 105 foot-pounds.

7. Install wheel and lower rear end of car.

7. Axle Shaft Removal and Installation 8. Rear Axle Oil Seal Replacement

Commercial Chassis Commercial Chassis

a. RemovalWheneveran axle shaft oil seal is removedon

commercial cars, a new oil seal must be installed.

1. Raise rear end of car and remove wheel.

2. Remove retaining nut and lock washerfromGuard against any bending or denting of seals,

end of axle shaft and discard washer,as this might cause leakage after installation.Even a slight scratch across sealing lip mightprovide a channel for oil to seepthrough. Seals

NOTE: Engage parking brake to prevent should be soaked in clean motor oil for 1/2 hourbrake drum from turning while loosening re- before being installed.taming nut.

Afte.r removing wheel and axle shaft, seal3. Release parking brake and pull wheel hub may be removed from rear axle housing. A tool


Fig. 7-14 Rear Axle Oil Seal Remover ToolCommercial Chassis

consisting of a flat plate, as shown in inset, Fig.7-14, may be made up and usedwith Slide Hammer, J-2619, to remove axle shaft seal.

Install plate on slide hammer shaft,using a flatwasher and nut on threaded end of shaft to holdplate in position. Slide shaft with plate throughseal and pull shaft outward to position plateagainst inside face of seal, Fig. 7-14. Be sureplate is not behind shoulder in housing, as thiswould bend plate. Drive outward with slide hammer to remove seal.

Before installing a new seal, wipe counterhoreinto which seal is pressedand carefully removeany nicks or burrs. Sealing surfaceon axle shaftshould be polished, using 400 grit "wet" paperand kerosene to insure a smooth surface and toprevent wear on seal. Clean shaft after sanding.

Outside diameter of oil seal should be coatedwith non-hardening gasket sealer before installation.

Oil seal must be pressedsquarely into its boreand against its seat. Use flat plate previouslyused for removing seal. Tap gently on plate, beingcareful not to distort seal casing.

9. Differential Carrier Removaland InstallationNOTE: Any service on the differential

carrier assembly,standard or controlled type,except pinion oil seal, and flange or yoke replacement, Notes 2 and 3, should be handled byreplacementof the completeassembly. No disassembly or adjustment of this unit should beattempted in the field, becausespecial equipment is neededfor selectionof mating parts andsetting side bearing pre-load.

a. Removal

2. Removeaxle shafts, as described in Notes 6and 7.

3, Remove nuts and washers that hold carrierto axle housing, and removeentire assemblywithgasket. Provide container for collecting oil asdifferntial carrier is removed from axle housing.

NOTE: Whenever a carrier is removed because of scored gears, worn bearings, or anyfailure that might causedirt or metal chips, remove axle housing from car for thoroughcleaning before new carrier is installed. Also checkaxle shaft assembliesand clean as necessary.

b. Installation

NOTE: On cars equipped with a ControlledDifferential, check internal splines of differential side gears and cone clutches to be surethey are aligned. This check is madeby inserting axle shaft splmnes in each side of differential until they bottom against differentialpinion shaft approximately 4 inches.

1. Scrapeany old gasketmaterial from housing.Coat both sides of a new gasketwith non-hardening sealerand placegasketon housing.

2. Position differential carrier on axle housingand install new copper washersand nuts on housing studs. Tightennuts to 37 foot-pounds.

3. Install axle shafts as described in Notes 6and 7.

4. Fill rear axle with lubricant as describedinSection 2, Note 4. If a replacementdifferential isinstalled, the specialdifferential lubricant shippedwith the new differential must be used.

5. Connect rear universal joint at pinion flangeor yoke and tighten bolts or nuts to specifiedtorque, Notes 2b and 3b.

NOTE: In case of lubricant leakagebetweendifferential carrier and axle housing,make surethat nuts are tightened to 37 foot-pounds. Ifthis does not stop leak, install an extra gasket,using a non-hardening sealer.

10. Propeller Shaft Assembly Removaland Installation

a. Removal

1, Raise car on hoist.

2. Removetwo centerbearingsupport-to-framebolts. The nuts for thesebolts are tack-weldedtothe center bearing support and bracket assembly,and remain fastenedto the bracket.

3. Remove four attaching screws and lockwashers at rear axle pinion flange on 60 and 62series cars. Remove "U" bolts and locks on

7-10

1. Disconnect rear universal joint at pinionflange or yoke.


front yoke offthrough frame

rear. Be careful

Seventy-five series cars and the commercialchassis.

4. Slide propeller shaft andtransmission output shaft andtunnel section, removing it at thenot to nick front yoke.

5. Slide a spare yoke into transmissionextension housing to preventoil loss,

b. Installation

1. Install cardboard shipping cover on frontyoke and slide propeller shaft through frametunnel.

2. Remove cover from yoke and lubricate yokewith transmission fluid type "A".

3. Remove spare yoke previously installed intransmission extension housing, and install frontyoke on transmission output shaft.

4. Install two center bearing support-to-framebolts. Tighten bolts to 16 foot-poundson 60 arid 62series cars, and 30 foot-pounds on Seventy--Fiveseriescars and commercialchassis,

5. Remove any nicks or burrs from rear axlepinion flange and mating flange on rear universaljoint.

6. On 60 and 62 seriescars, connectrear universal joint to pinion flange. Apply parking braketo preventpropeller shaft from turning and installfour screws and lock washers, tightening screwsto 65 foot-pounds.

CAUTION: Do not use a pry bar or heavytool to hold propeller shaft when tighteningflange attaching screws, otherwise universaljoint bearingsealswill becomedamaged.

On Seventy-Five series cars and commercialchassis, connect rear universal joint to pinionyoke. Install "U" bolts, locks, and nuts, tightening nuts to 15 foot-pounds.

7, Lower car on hoist.

Horizontal or vertical alignment of propellershaft should not be necessaryon 1963 model cars,other than making certain that the propeller shaftis properly aligned in relation to the transmission, Any vertical deviation from the correctinstallation that might cause propeller shaftvibration at low speed 0-50 mph, can usually becorrected by adding .075 inch shims at the enginerear mount. Not more than four shims should beused, otherwise there will be insufficient clearancebetweentransmissionand floor pan.

Usually the addition of shims will eliminate lowspeed vibration caused by misalignment of propeller shaft at transmission. However, other

factors contributing to this condition could be dueto universal joint failure, excessivetire or wheelrunout, wheel, tire, or brake drum out of balance,and tires other than original equipmentbeingused.

11. Propeller Shaft Front SlipYoke Leak Test

1. Remove propeller shaft as described in NoteiDa.

2. Hold openend of yoke up and fill with solvent,

3. Check area around yoke plug for signs ofleaking.

4. If plug is loose or leaks, install new slipyoke and front universal joint assembly.

5. After leak test, remove all tracesof solventwith compressedair.

6, Install propeller shaft as described in NotelOb.

12. Standard Universal Joints Removaland Installation

Disassembly and repacking of the universaljoints is not recommended.Disassembly is recommendedonly when joint is loose, worn or noisy,and then universal joint should be replaced. Whenan original universal joint hasbeendisassembled,it can not be reassembledbecausethere are noprovisions for replacing the injected nylon ringbetween the bearing cup and yoke. Disassemblyand repacking of replacementjoints is not recommended becausechanges in the normal wearpattern on the needleswill invite premature wearand eventualfailure.

NOTE: Constant velocity type universaljoints are not serviced separately from propeller shaft assembly. The following procedurepertains to standard universal joints used on

7-11

Fig. 7-15 Installing Bearing Remover Tool


NOTE:is used.removing

Seventy-Fiveseriescars andcommercialchassis, and to the front universal joint usedon 60and 62 series cars,

a. Removal

1. Remove propeller shaft assembly as described in Note lOa.

2, If universal joint being removed is a replacementjoint, removelock rings from bearings.On original universal joints, the injected nylonring will shear off when bearing is removed.

3. Support yoke or bearing trunnion on visejaws, position Bearing Remover, J-4l74, over endof bearing cup, andpound on Remover Tool witha hammer until bearing is driven out of yoke andinto Remover Tool about 1/2 inch, Fig. 7-15.

4. Place Bearing Removerwith bearing in vise.Tightenvise until bearing is held securelyby tool,then drive yoke away from tool until bearing isremoved, Fig. 7-16.

5. Repeat steps 3 and 4 on other bearings.Remove anddiscard universal joint cross.

b. Installation

1. Start one bearing and seal assembly intopropeller shaft yoke by tapping lightly with ahammer, being careful not to dislocate needlesin bearing.

2, Inspect seal retainerson new universal jointcross and replaceif damaged.

3. Check holes in ends of cross arms, makingcertain they are filled with universal joint grease.

4. Install universal joint cross in position andguide into bearingalready started,

Only one size universal joint bearingUse Bearing Remover, J-4174, forbearings.

5. Start opposite bearing into propeller shaftyoke and place in vise with jaws againstbearings,Fig. 7-17.

6, Tighten vise until cross is just ready toenter oppositebearingand adjust position of crossuntil it entersboth bearings.

7. Tighten vise until both bearings are in farenoughto allow lock rings to be installed.

NOTE: If bearings do not go into positionwith normal pressure on the vise, a needlebearing may have fallen Out of place. Removebearingand reposition needle,

CAUTION: Whenever all needles are removed from bearing assembly, make certainthat ring is installed in bottom of bearingcupbefore installing needles.

8. Install lock rings, making certain that theyare properly seatedin groove.

9. Repeat above procedure on remaining

10. Install propeller shaft assembly as describedin Note lOb.

13. Front and Rear Propeller ShaftsDisassembly and AssemblyFigs. 7-2 and 7-18

a. Disassembly

1. Remove propeller shaft assembly as described in Note lOa.

2. Pry up centerbearinglock retainer.

3. Back off center bearing retaining nut, usingCenter Bearing Retaining Nut Remover and Installer, J-21009, and separate front and rear

bearings.

7-12

Fig. 7-17 Installing Universal Joint Bearings

Fig. 7-16 Removing Universal Joint Bearing


propeller shafts by sliding front shaft off centerslip yoke.

4. Remove and discard center bearing locKretainer,

5. Remove center slip yoke seal, split washer,and center bearing retaining nut from slip yoke.Discard sealand split washer.

b. Assembly

1. Clean inner spline of front propeller shaftand spline of centerslip yoke.

2. Install center bearing retaining nut on slipyoke with threaded end toward front propellershaft,

3. Install new split washer, being sure to slidewasher securely against inner shoulderof retaining nut.

4. Slide new slip yoke seal over center slipyoke and into retaining nut.

5. Install new center bearing lock retainer oncenter slip yoke.

6. Coat inner spline of front propeller shaftand spline of center slip yoke with centerbearingslip yoke lubricant available from factory PartsWarehouses.

7. Slide center slip yoke and rear propellershaft into front propeller shaft spline.

8. Tighten center bearing retaining nut to 55foot-pounds using Center Bearing Retaining Nut

Remover and Installer J-21009 and a 100 foot-pound torque wrench, Fig. 7-19.

CAUTION: Particular care should be takenin application of torque wrench andinstaller tool,to prevent over-torquing the nut. Hold torquewrench perpendicular to installer tool to canceloff-set error on torque reading.

9. Bend edge of center bearing lock retainerin two placesto lock centerbearingretaining nut.

10. Install propeller shaft assembly as described in Note lOb.

14. Propeller Shaft Center BearingRemoval and Installation

a. Removal

1. Remove propeller shaft assembly as describedin Note lOa.

2, Disassemblefront and rear propeller shaftsasdescribedin Note 13a.

3. Remove center bearing support and bracketassembly from front propeller shaft by tappingon front side of assembly with a soft headhammer.

4. Remove slinger from endof propeller shaft.

5, Pry out snap ring from front of bearingandremove bearing from support bracket by tappinglightly from rear with a soft head hammer.

7-13

Fig. 7-18 Propelled Shaft DisQssembled 75 series cars


Fig. 7-19 Tightening Center Bearing Retaining Nut

b. Installation

1, Press bearing into support bracket, using

care not to damagebearingor support, and secure

bearing in support bracket with snapring.

2, Pack front and rear face of center bearingwith heavy duty water pump grease.

3. Install slinger on front propeller shaft.

4. Position center bearingsupport assemblyonrear of front propeller shaft with snapring facingfront end of shaft, and tap entire assemblyon tofront shaft until it fits securely against inwardedge of shaft.

5. Assemble front and reardescribed in Note 13b.

6. Install propeller shaftscribed in Note lOb,

propeller shaftsas

assembly as de

TORQUE SPECIFICATIONS

MaterialNumber

Application Size Foot-Pounds

300-M Brake Backing Plate to Axle Housing BoltsCommercial Chassis 7/16-20 70

300-M Brake Backing Plate to Axle Housing Nuts60, 62, and Seventy-Five Series 3/8-24 40

Special Axle Shaft Hub Nut Commercial Chassis 1-1/8-12 300

Special Differential Carrier to Axle Housing Nuts 3/8-24 37

Special Pinion Shaft Nut 7/8-14 Notes 2b, 3b-Step 7

300-M Pinion Flange to Universal Joint FlangeAttaching Screws 60 and 62 Series 7/16-20 65

286-M U-Bolt Nuts Seventy-Five Series andCommercial Chassis 5/16-24 15

Special Propeller Shaft Center Bearing Retaining Nut 1-9/16-18 55

28O-M Center Bearing Support Bolts60 and 62 Series 5/6-24 16

28O-M Center Bearing Support Bolts Seventy-FiveSeries and Commercial Chassis 3/8-24 30

286-M Wheel Mounting Nuts 1/2-20 105

NOTE: Refer to Back of Manual, Page 17-1, for Bolt and Nut Markings and Steel Classifications.

7-14

PROPELLEIR SHAFT AND REAR AXLE 7-15

A B

U

M

Q

Fig 7-20 Special Tools

Key Tool No, Name Key Tool No. Name

A J-257l-l Pinion Nut Socket J J-6257 Rear Wheel Bearing InstallerB J..257l.2 Pinion Nut Adapter K J-2lOlO Rear Wheel Bearing OilC J-- 2619 Slide Hammer Seal RemoverD J..8l3l Rear Axle Shaft Puller L J-2lOll Rear Wheel Bearing OilE J-.21l13 Pinion Oil Seal Installer Seal InstallerF J--4l74 Universal Joint Bearing

RemoverM J-86l4-l Pinion Flange Holding

ToolG J-21009 Center Bearing Retaining Nut

Remover and InstallerN J-21O44 Adapter 2 req’d. use with

J-8614-lH J-2986-l Rear Wheel Bearing Plate

and Pin Assembly0 J-8614-2 Rear Axle Pinion Flange

PullerI J-2986-3 Rear Wheel Bearing Holding

ToolP

QJ-6544J-6295-1

Pinion Yoke Holding ToolRear Axle Pinion Yoke Puller

-

C

D

E

7-16 PROPELLER SHAFT AND REAR AXLE

SPECIFICATIONS

Item All SeriesUnless Otherwise Noted

Axle Shaft Length

Left Side - 60, 62, and Seventy-Five Series Cars 28-31/32"Left Side - Commercial Chassis 32-9/16"Right Side - 60, 62, and Seventy-Five Series Cars 31-37/64"Right Side - Commercial Chassis 35-5/32"

Axle Shaft Run-out at ground surface near splines .006" Maximum

Outer Surface of Axle Shaft Flange to Inner End ofWheel Bearing Inner-race - 60, 62, and 75 Series Cars 3-7/32"

Gear Ratio

60 and 62 Series Cars except cars equipped with anAir Conditioner 2,94-1

60 and 62 Series Cars when equipped with an AirConditioner also optional on all 60 and 62 series cars 3.21-1

Seventy-Five Series Cars standard and whenequipped with an Air Conditioner 3.36-1

Commercial Chassis - Standardoptional onSeventy-Five series cars 3.77-1

07 -Propeller and Rear Axle

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