PROPELLER SHAFT AND REAR AXLE

Transcription

1 PROPELLER SHAFT AND REAR AXLE 7-1 GENERAL DESCRIPTION The standard differential carrier assembly used on 1963, 60 and 62 series Cadillac cars is shown in Fig A controlled type differential is available as an option on all 1963 model cars. A double lip rear axle pinion oil seal is used on both type differential carriers. The flangeless type seal case is of one piece construction and the double lip feature provides a better seal to keep dirt and water away from the oil sealing member. A flange is used at the forward end of the rear axle pinion on both the standard and controlled differential carrier assemblies on all 60 and 62 series cars. A conventional pinion yoke is used at the forward end of differential carrier assemblies on Seventy-Five series cars and commercial chassis. Aside from this, the differential carrier assemblies are basically the same on all series cars. Rear Axle The rear axle gear ratios used on the different series cars provide maximum performance and economy for each series. The ratio is used on all 60 and 62 series, except Air Conditioned cars which use the ratio. The ratio is also offered as an option on 60 and 62 series cars not equipped with an Air Conditioner. The ratio is used on all Seventy-Five series cars and the ratio is used on the com mercial chassis, as well as being optional on Seventy-Five series cars. Greased and sealed rear wheel bearings are used on all 60, 62, and Seventy-Five series cars. The bearings are sealed on the outer side by a rubber grease seal that is an integral part of the bearing. The inner oil seal, however, can be serviced separately from the bearing. The rear wheel bearings require no adjustment or periodic lubrication. Sealing between the outer diameter of the bearing and inner diameter of the axle housing is accomplished by an 0-ring seal that should be replaced whenever the axle shaft is removed. Rear wheel bearings on the commercial chassis are sealed on both sides by grease seals that are lubricated by an initial grease packing. An ad ditional inner shaft seal prevents differential lubricant from entering the bearings and brake assembly. Whenever a rear axle shaft oil seal is removed, a new oil seal must be installed. Propeller Shaft Power is transmitted from the transmission to the rear axle assembly by a two-piece propeller shaft. The propeller shaft assembly used on all Pinion Flange -* Pinion Oil Seal Tapered Roller Bearings Lubricant Passage to 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

2 7-2 PROPELLER SHAFT AND REAR AXLE Transmission Front Slip Universal Front Propeller Yoke Joint Shaft Center Bearing Support and Bracket Assembly Lock Center Slip Yoke Seal Fig. 7-2 Propeller Shaft Disassembled 60 and 62 series cars 1963, 60 and 62 series cars, Fig. 7-2, incorpo rates two constant velocity type universal joint assemblies -- one in the center and one at the rear, and a standard universal joint at the front. The propeller shaft assembly is attached to the rear axle by means of a double flange connection. A flange on the rear universal joint attaches to a flange on the rear axle pinion by four screws and lockwashers. The constant velocity universal joint assembly consists of two single joints connected with a special link yoke. A center ball and socket be tween the joints maintains the relative position of the two units. This center ball causes each of the two units to operate through exactly one half of the complete angle between the front and rear propeller shafts, and the rear propeller shaft and axle. Propeller shafts with constant velocity type universal joints are serviced as an assembly. However, the front standard universal joint, the center bearing, and the center bearing support and its related parts can be serviced separately. The propeller shaft assembly used on Seventy- Five series cars and the commercial chassis in corporates standard universal joints at each end and in the center. The propeller shaft is attached to the rear axle by two "U" bolts, locks, and nuts that attach the rear universal joint cross bearings to the yoke on the rear axle pinion. Universal joints used on 1963 Cadillac cars cannot be repacked. On original universal joints, the injected nylon ring used to retain the bearing cup in the yoke will shear off when bearing is re moved. There are no provisions for replacing the nylon ring other than installing a new universal joint. The only time disassembly is recommended, is when a joint becomes loose, worn or noisy, and then the joint assembly should be replaced. On all series cars, the propeller shaft is sup ported in the center by a center bearing support and bracket assembly located in the frame tunnel section. The center bearing support is somewhat shorter on 60 and 62 series cars. A splined slip yoke is used on the front end of the rear section of the propeller shaft on all series cars. The yoke fits into a splined coupling in the rear end of the front section of the propel ler shaft. This slip spline permits the slight lengthening and shortening of the propeller shaft required by the movement of the rear axle. Controlled Differential The basic advantage of the optional Controlled Differential over the standard differential is that the major driving force is always directed to the wheel having the greater traction. The unit is not a positive lock type. It will release before an ex cessive amount of torque is directed to one rear wheel. The main purpose of the Controlled Differential is to reduce the possibility of the car getting stuck while driving under slippery conditions. It also minimizes wheel spin and resultant drive line shock when accelerating on an uneven road surface.

3 PROPELLER SHAFT AND REAR AXLE 7-3 During normal driving and cornering, the Con trolled Differential unit functions as a standard differential. When one wheel encounters a slip pery surface, however, the Controlled Differential allows the wheel with the greater traction to drive the car. Wheelspin can occur if over-acceleration is attempted. However, the major driving force will still be directed to the other wheel. This condition does not indicate failure of the unit. When checking the runout of rear wheels on cars equipped with a Controlled Differential, be sure to raise both rear wheels off the ground. Otherwise, the wheel in contact with the ground will drive when the opposite wheel is raised and rotated. Cars equipped with the Controlled Differential should use only the special lubricant available from factory Parts Warehouses to assure satis factory operation of this unit. All service information in this section applies to the controlled as well as the standard differ ential carrier assemblies, unless otherwise noted. Both of these differentials are serviced as assemblies. SERVICE INFORMATION 1. Rear Axle Gear Ratio Identification The gear ratio of the rear axle assembly on 1963 series Cadillac cars can be determined by an identification number stamped on the front face of the carrier assembly at the end of the oil re turn passage, Fig In the case of a controlled differential, the letter "G" precedes the axle ratio identification number. For example; "G2" is a controlled dif ferential with a rear axle gear ratio of The serial number of the differential carrier is stamped on the bottom of the carrier on the flange adjacent to the rear axle housing. The gear ratios and corresponding identification numbers for the various series are as follows: Identification Series Ratio Number* 2. Rear Axle Pinion Flange and Oil Seal Removal and Installation 60 and 62 Series When replacing the rear axle pinion flange or oil seal, follow the procedure outlined below. Failure to do so may result in overloaded pinion bearings or drive pinion end play. a. Removal 1. Raise rear end of car, and remove both rear wheels and brake drums to eliminate drag when measuring torque readings. 2. Disconnect rear universal joint from pinion flange. 3. Using a inch-pound torque wrench, with Socket, J-2571-l, and Adapter, J-257l-2, measure the inch-pounds torque required to ro tate the pinion shaft slowly for at least 2 turns, Fig Record torque reading & 62 series except cars equipped with an Air Conditioner & 62 series cars when equipped with an Air Conditioner. optional on all 60 & 62 series cars series cars Commercial Chassis Optional on 75 series cars *Letter "G" preceding the identification number indicates a controlled differential. Fig. 7-3 Checking Pinion Shaft Pre-load Torque 60 and 62 series cars

4 7-4 PROPELLER SHAFT AND REAR AXLE b. Installation 1. Position oil seal in carrier. Place Oil Seal Installer, J-2l1l3, against seal and secure tool and seal with pinion nut and washer. 2. Install Pinion Nut Socket, J-2571-l, on pinion nut and press oil seal into carrier by tightening pinion nut with socket, Fig. 7-5, until Installer Tool bottoms on face of carrier. 3. Remove Pinion Nut Socket, pinion nut and washer, and Oil Seal Installer. CAUTION: - Make certain that seal surface of flange is free from scratches or nicks. If necessary, clean with No. 400 grit "wet" paper and kerosene. Use only a circular motion when sanding seal surface of flange so as not to leave any spiraled marks on seal surface. Fig. 7-4 Removing Pinion Flange 4. Install Adapters, J on pinion flange and install Pinfon Flange Holding Tool, J-8614-l, with raised side of tool against adapters and se cure wirh two attaching bolts. 5. Install Socket, J-2571-l, on pinion nut through hole in Holding Tool and -remove nut, using 3/4 inch drive socket wrench. 6. Remove washer from pinion shaft and mark pinion shaft and flange so that flange can be in stalled in same position on spline. 7. Install Rear Axle Pinion Flange Puller, J , through hole in Holding Tool, index puller 45 and remove pinion flange from pinion shaft, Fig Pry out pinion oil seal. 9. Remove staking burrs on pinion shaft threads with a small file or a 7/8 inch x 14 thread die. 4. Install flange on pinion shaft splines with alignment marks lined up. 5. Install washer and new pinion nut on pinion shaft. 6. Install Adapters, J-21044, on pinion flange and install Pinion Flange Holding Tool, J-8614-l, on adapters with raised side of tool against adapters. Secure with two attaching bolts. 7. Install Socket, J-2571-l, on pinion nut through hole in Holding Tool and tighten nut using 3/4 inch drive socket wrench, Fig. 7-6, until proper pre- load of bearing is attained. NOTE: Proper pre-load of bearing is attained when torque required to rotate pinion shaft is from 2 to 5 inch-pounds greater than the torque recorded in Step 3 of the removal procedure. It will be necessary to remove Holding Tool and drive socket wrench in order Fig. 7-5 Installing Pinion 00 Seal Fig. 7-6 Tightening Pinion Nut 60 and 62 Series cars

5 PROPELLER SHAFT AND REAR AXLE to install inch-pound torque wrench and Adapter, J-257l-2, to check torque required to rotate pinion shaft, Fig If torque is low, tighten pinion nut slightly and again measure the inch-pounds torque required to rotate pinion shaft. Repeat this operation, tight ening the nut slightly each time, until specified torque is obtained. It will require approximately 200 foot-pounds torque on pinion nut to obtain proper bearing pre-load. CAUTION: Do not overtighten, and never back off on the nut to reduce pre-load torque. The average torque on an assembly with over 1,000 miles is between 15 and 20 inch-pounds. The torque on a new assembly is approximately 50 inch-pounds. 8. Remove Holding Tool Adapters, J-2l044, from flange. 9. Stake pinion shaft into nut. 10. Connect rear universal joint to pinion flange. Apply parking brake to prevent propeller shaft from turning and install four screws and lock washers, tightening screws to 65 foot-pounds. CAUTION: Do not use a pry bar or heavy tool to hold propeller shaft when tightening flange attaching screws, otherwise universal joint bearing seals will become damaged. 11. Refill rear axle to scribed in Section 2, Note lubricant available from houses for cars equipped ferential. correct level as de 4. Use only the special factory Parts Warewith a Controlled Dif 12. Reinstall brake drums and rear wheels, and lower car. 3. Rear Axle Pinion Yoke and Oil Seal Removal and Installation 75 Series and Commercial Chassis When replacing the rear axle pinion yoke or oil seal, follow the procedure outlined below. Failure to do so may result in overloaded pinion bearings or drive pinion end play. Fig. 7-7 Checking Pinion Shaft Pre-Load Torque 75 series cars and commercial chassis 4. Install Pinion Yoke Holding Tool, J-6544, on yoke and install two attaching nuts. 5. Install Socket, J-257l-l, on pinion nut through hole in Holding Tool and remove nut, using 3/4 inch drive socket wrench. 6. Remove washer from pinion shaft and mark pinion shaft and yoke with a punch so that yoke can be installed in same position on spline. 7. Remove pinion yoke from pinion shaft using Puller, J-6295-Ol, Fig Pry out pinion oil seal. 9. Remove staking burrs on pinion shaft threads with a small file or a 7/8 inch x 14 thread die. a. Removal 1. Raise rear end of car, and remove both rear wheels and brake drums to eliminate drag when measuring torque readings. 2. Disconnect rear universal joint from pinion yoke. 3. Using a inch-pound torque wrench, with Socket, J , and Adapter, J , measure inch-pounds torque required to rotate pinion shaft slowly for at least 2 turns, Fig Record the torque reading. Fig. 7-8 Removing Pinion Yoke

6 7-6 PROPELLER SHAFT AND REAR AXLE b. Installation 1. Position oil seal in carrier. Oil Seal Installer, J-21ll3, against cure tool and seal with pinion nut Place Pinion seal and Seand washer. 10. Refill rear axle to correct level as de scribed in Section 2, Note 4. Use only special lubricant available from factory Parts Ware houses for cars equipped with a Controlled Dif ferential. 2. Install Pinion Nut Socket, J , on pin ion nut and press oil seal into carrier by tighten ing pinion nut with socket wrench, Fig. 7-5, until Installer Tool bottoms on face of carrier. 3. Remove Pinion Nut Socket, pinion nut and washer, and Oil Seal Installer. CAUTION: Make certain that seal surface of yoke is free from scratches or nicks. If necessary, clean with No. 400 grit "wet" paper and kerosene. Use only a circular motion when sanding seal surface of yoke so as not to leave any spiraled marks on seal surface. 4. Install yoke on pinion shaft splines with punch marks lined up. 5. Install washer and new pinion nut on pinion shaft. 6. Install Pinion Yoke Holding Tool, J-6544, on yoke and install two attaching nuts. 7. Install Socket, J , on pinion nut through hole in Holding Tool and tighten nut, using 3/4 inch drive socket wrench, until proper pre load of bearing is attained. NOTE: Proper pre-load of bearing is at tained when torque required to rotate pinion shaft is from 2 to 5 inch-pounds greater than the torque recorded in Step 3 of the removal procedure. It will be necessary to remove Holding Tool and drive socket wrench in order to install inch-pound torque wrench and Adapter, J-257l-2, to check torque required to rotate pinion shaft, Fig If torque is low, tighten pinion nut slightly and again measure inch-pounds torque required to ro tate pinion shaft. Repeat this operation, tightening the nut slightly each time, until specified torque is obtained. It will require approximately 200 foot-pounds torque on pinion nut to obtain proper bearing pre-load. CAUTION: Do not overtighten, and never back off on the nut to reduce pre-load torque. The average torque on an assembly with over 1,000 miles is between 15 and 20 inch-pounds. The torque on a new assembly is approximately 50 inch-pounds. 8. Stake pinion shaft into nut. 9. Connect rear universal joint to pinion yoke. Install "U" bolts, locks, and nuts, tightening nuts to 15 foot-pounds. 11. Reinstall brake drums and rear wheels, and lower 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 tool handle to lower control link. 3. Pull parking brake cable on one wheel to prevent wheel from turning. This is not neces sary on cars equipped with a Controlled Differ ential. 4. Measure rotation backlash of opposite wheel in inches at outer circumference of tire tread. A stiff wire pointer fastened to the fender or car frame will aid in this measurement. Maxi mum backlash under this condition should not ex ceed 1/2 inch on standard differentials and 1/8 inch on Controlled Differentials. 5. Rear Wheel and Brake Drum Removal and Installation a. Removal 1. Raise rear end of car, place jack stands under rear frame rails, and remove wheel. 2. Remove two screws holding brake drum to axle shaft flange. For commercial chassis, see Note 7a. 3. Remove brake drum. b. Installation 1. Install brake drum on rear axle shaft flange and secure with two screws. 2. Install wheel and replace wheel mounting nuts, tightening to 105 foot-pounds. For com mercial chassis see Note 7b. 3. Remove jack stands and lower car. 6. Axle Shaft, Bearing Oil Seal, and Wheel Bearing Removal and Installation Fig. 7-9 Except Commercial Chassis a. Removal of Axle Shaft and Bearing Assembly 1. Raise rear end of car and remove wheel and brake drum as described in Note 5a.

7 PROPELLER SHAFT AND REAR AXLE 7-7 Bolt Flange Gasket I Axle / Backing Plate Pawl Wheel Cylinder Bearing Adjuster Link Brake Shoe Adjuster Actuator 0" Ring Cover IWheel Mounting Bolt Bearing Flanged Axle Brake Drum // Fig. 7-9 Rear Wheel Disassembled 2. Remove four nuts and lock washers that hold cover, gasket, and backing plate to rear axle housing. 3. Install Axle Shaft Puller, J-8l31, on studs of rear axle shaft flange and install Slide Hammer Assembly, J-2619, in Puller, Fig Drive outward with slide hammer to remove axle shaft assembly. Remove and discard cover gasket. b. Replacing Rear Wheel Bearing Oil Seal 1. Using a cold chisel and hammer, notch bear ing retainer next to bearing, being careful not to damage hearing. NOTE: Bearing Drive chisel into can be slipped off retainer need not be split. retainer only until retainer shaft, then remove retainer. 2. Wipe shaft and bearing clean. 3. Remove oil seal from bearing using Oil Seal Remover, J-2l010, Fig Hook slotted flange of remover tool under rolled edge of seal case and pry up on tool handle. Then slide seal off axle shaft. NOTE: If bearing grease has been diluted by axle oil, drain and wipe out oil. 4. Squeeze contents of tube of wheel bearing grease included in seal replacement kit inside the bearing. Also apply a thin film of grease around lip of seal. 5. Install new oil seal on axle shaft with spring side of seal toward splined end of shaft. Position Fig Removing Rear Axle Shaft Fig Removing Oil Seal From Bearing

8 7-8 PROPELLER SHAFT AND REAR AXLE c. Replacing Rear Wheel Bearing and Seal Assembly 1. Using a cold chisel and hammer, notch bear ing retainer next to bearing. NOTE: Bearing retainer need not be split. Drive chisel into retainer only until retainer can be slipped off shaft, then remove retainer. 2. Place rear axle shaft and bearing assembly in "U" shaped piece of Rear Wheel Bearing Plate and Pin Assembly, J-2986-l, and position on arbor press. Fig Installing Oil Seal In Bearing seal in bearing and press seal into bearing using Oil 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 letting installer tool slide down axle shaft under its own weight. 6. Install new bearing retainer on axle shaft. Insert axle shaft through ring of Bearing Installer, J-6257, and "U" shaped piece of Bearing Plate and Pin Assembly, J-2986-l, and place on arbor press. 7. Press shaft through retainer until retainer just contacts bearing. Remove shaft assembly from installer tools. CAUTION: Make certain that axle shaft flange is properly centered in arbor press and free from any obstructions. 3. Install Rear Wheel Bearing Holding Tool, J , around bearing and over dowels, Fig CAUTION: Step 3 must be performed to de crease danger of bearing exploding while under arbor press load. 4. Press axle shaft through bearing and remove bearing. NOTE: If rear wheel hearing has been re moved because of failure, inspect axle housing and differential carrier for metal chips, and clean thoroughly if necessary. 5. Inspect cover for damage. Replace if neces sary. Fig Removing and Installing Rear Wheel Bearing

9 PROPELLER SHAFT AND REAR AXLE Install new wheel bearing and seal assembly and brake drum assembly off shaft. Use a fiveon shaft so that 0-ring groove is toward splined jaw puller, to reduce the 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 washers that staller, J-6257, and "U" shaped piece 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 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 between outer surface of 6. Pull axle shaft and bearing assembly from axle shaft flange and inner end of wheel bearing housing as a complete assembly. Be careful not to inner race, Fig damage axle shaft oil seal. 9. Release arbor press and remove axle shaft from installer tools. 10. Install new bearing retainer on axle shaft and reinstall shaft on installer tools, 11. Press shaft through retainer until retainer just contacts bearing. Remove shaft from installer tools. d. installation of Axle Shaft and Bearing Assembly 1. Apply film of differential lubricant to wheel bearing bore in axle housing after checking for burrs and nicks, 2. Use a new gasket on cover and a new 0-ring seal on wheel bearing and install axle shaft being careful not to damage 0-ring seal. NOTE: Whenever axle shaft is removed, always install a new 0-ring seal on wheel bearing. 3. Install four nuts and lock washers on rear axle housing bolts, to hold cover, gasket, and brake backing plate in place, and tighten by inserting a socket wrench through large hole in rear axle flange. Torque nuts to 40 foot-pounds. 4. Install brake drum and two retaining screws, 5. Install wheel and lower car. Tighten wheel mounting nuts to 105 foot-pounds. b. Installation NOTE: Before installing axle shaft after an oil seal has been replaced, inspect rear wheel bearing for loss of lubricant, since a leak in an old seal may permit differential lubricant to "wash out" grease in a sealed wheel bearing. A wheel bearing that spins freely indicates a lack of grease, and should be replaced at same time new oil seal is installed. 1. Install axle shaft and bearing assembly into housing as a complete assembly. Be careful not to damage axle shaft oil seal. 2. Install bearing retainer and key on end of shaft. 3. Install seven bolts and lock washers that hold bearing retainer and backing plate to axle housing flange. Tighten bolts to 70 foot-pounds. Ofl 4. Install wheel hub and brake drum assembly shaft. 5. Install new lock washer and retaining nut on end of axle shaft. 6. Engage parking brake and tighten retaining nut to 300 foot-pounds, then bend washer along one flat of nut. 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 Whenever an axle shaft oil seal is removed on a. Removal commercial cars, a new oil seal must be in stalled. 1. Raise rear end of car and remove wheel. Guard against any bending or denting of seals, 2. Remove retaining nut and lock washer from as this might cause leakage after installation. end of axle shaft and discard washer, Even a slight scratch across sealing lip might provide a channel for oil to seep through. Seals NOTE: Engage parking brake to prevent should be soaked in clean motor oil for 1/2 hour brake drum from turning while loosening re- before being installed. taming nut. Afte.r removing wheel and axle shaft, seal 3. Release parking brake and pull wheel hub may be removed from rear axle housing. A tool

10 7-10 PROPELLER SHAFT AND REAR AXLE 2. Remove axle shafts, as described in Notes 6 and 7. 3, Remove nuts and washers that hold carrier to axle housing, and remove entire assembly with gasket. Provide container for collecting oil as differntial carrier is removed from axle housing. NOTE: Whenever a carrier is removed be cause of scored gears, worn bearings, or any failure that might cause dirt or metal chips, re move axle housing from car for thorough clean ing before new carrier is installed. Also check axle shaft assemblies and clean as necessary. b. Installation Fig Rear Axle Oil Seal Remover Tool Commercial Chassis consisting of a flat plate, as shown in inset, Fig. 7-14, may be made up and used with Slide Ham mer, J-2619, to remove axle shaft seal. Install plate on slide hammer shaft, using a flat washer and nut on threaded end of shaft to hold plate in position. Slide shaft with plate through seal and pull shaft outward to position plate against inside face of seal, Fig Be sure plate is not behind shoulder in housing, as this would bend plate. Drive outward with slide ham mer to remove seal. Before installing a new seal, wipe counterhore into which seal is pressed and carefully remove any nicks or burrs. Sealing surface on axle shaft should be polished, using 400 grit "wet" paper and kerosene to insure a smooth surface and to prevent wear on seal. Clean shaft after sanding. Outside diameter of oil seal should be coated with non-hardening gasket sealer before in stallation. Oil seal must be pressed squarely into its bore and against its seat. Use flat plate previously used for removing seal. Tap gently on plate, being careful not to distort seal casing. 9. Differential Carrier Removal and Installation NOTE: Any service on the differential carrier assembly, standard or controlled type, except pinion oil seal, and flange or yoke re placement, Notes 2 and 3, should be handled by replacement of the complete assembly. No dis assembly or adjustment of this unit should be attempted in the field, because special equip ment is needed for selection of mating parts and setting side bearing pre-load. a. Removal 1. Disconnect rear universal joint at pinion flange or yoke. NOTE: On cars equipped with a Controlled Differential, check internal splines of differ ential side gears and cone clutches to be sure they are aligned. This check is made by insert ing axle shaft splmnes in each side of differ ential until they bottom against differential pinion shaft approximately 4 inches. 1. Scrape any old gasket material from housing. Coat both sides of a new gasket with non-harden ing sealer and place gasket on housing. 2. Position differential carrier on axle housing and install new copper washers and nuts on hous ing studs. Tighten nuts to 37 foot-pounds. 3. Install axle shafts as described in Notes 6 and Fill rear axle with lubricant as described in Section 2, Note 4. If a replacement differential is installed, the special differential lubricant shipped with the new differential must be used. 5. Connect rear universal joint at pinion flange or yoke and tighten bolts or nuts to specified torque, Notes 2b and 3b. NOTE: In case of lubricant leakage between differential carrier and axle housing, make sure that nuts are tightened to 37 foot-pounds. If this does not stop leak, install an extra gasket, using a non-hardening sealer. 10. Propeller Shaft Assembly Removal and Installation a. Removal 1, Raise car on hoist. 2. Remove two center bearing support-to-frame bolts. The nuts for these bolts are tack-welded to the center bearing support and bracket assembly, and remain fastened to the bracket. 3. Remove four attaching screws and lock washers at rear axle pinion flange on 60 and 62 series cars. Remove "U" bolts and locks on

11 PROPELLER SHAFT AND REAR AXLE 7-11 Seventy-five series cars and the commercial chassis. 4. Slide propeller shaft and front yoke off transmission output shaft and through frame tunnel section, removing it at the rear. Be careful not to nick front yoke. 5. Slide a spare yoke into transmission exten sion housing to prevent oil loss, b. Installation 1. Install cardboard shipping cover on front yoke and slide propeller shaft through frame tunnel. 2. Remove cover from yoke and lubricate yoke with transmission fluid type "A". 3. Remove spare yoke previously installed in transmission extension housing, and install front yoke on transmission output shaft. 4. Install two center bearing support-to-frame bolts. Tighten bolts to 16 foot-pounds on 60 arid 62 series cars, and 30 foot-pounds on Seventy-- Five series cars and commercial chassis, 5. Remove any nicks or burrs from rear axle pinion flange and mating flange on rear universal joint. 6. On 60 and 62 series cars, connect rear uni versal joint to pinion flange. Apply parking brake to prevent propeller shaft from turning and install four screws and lock washers, tightening screws to 65 foot-pounds. CAUTION: Do not use a pry bar or heavy tool to hold propeller shaft when tightening flange attaching screws, otherwise universal joint bearing seals will become damaged. On Seventy-Five series cars and commercial chassis, connect rear universal joint to pinion yoke. Install "U" bolts, locks, and nuts, tight ening nuts to 15 foot-pounds. factors contributing to this condition could be due to universal joint failure, excessive tire or wheel runout, wheel, tire, or brake drum out of balance, and tires other than original equipment being used. 11. Propeller Shaft Front Slip Yoke Leak Test 1. Remove propeller shaft as described in Note ida. 2. Hold open end of yoke up and fill with solvent, 3. Check area around yoke plug for signs of leaking. 4. If plug is loose or leaks, install new slip yoke and front universal joint assembly. 5. After leak test, remove all traces of solvent with compressed air. 6, Install propeller shaft as described in Note lob. 12. Standard Universal Joints Removal and Installation Disassembly and repacking of the universal joints is not recommended. Disassembly is rec ommended only when joint is loose, worn or noisy, and then universal joint should be replaced. When an original universal joint has been disassembled, it can not be reassembled because there are no provisions for replacing the injected nylon ring between the bearing cup and yoke. Disassembly and repacking of replacement joints is not rec ommended because changes in the normal wear pattern on the needles will invite premature wear and eventual failure. NOTE: Constant velocity type universal joints are not serviced separately from pro peller shaft assembly. The following procedure pertains to standard universal joints used on 7, Lower car on hoist. Horizontal or vertical alignment of propeller shaft should not be necessary on 1963 model cars, other than making certain that the propeller shaft is properly aligned in relation to the transmis sion, Any vertical deviation from the correct installation that might cause propeller shaft vibration at low speed 0-50 mph, can usually be corrected by adding.075 inch shims at the engine rear mount. Not more than four shims should be used, otherwise there will be insufficient clear ance between transmission and floor pan. Usually the addition of shims will eliminate low speed vibration caused by misalignment of pro peller shaft at transmission. However, other Fig Installing Bearing Remover Tool

12 7-12 PROPELLER SHAFT AND REAR AXLE Seventy-Five series cars and commercial chas sis, and to the front universal joint used on 60 and 62 series cars, a. Removal 1. Remove propeller shaft assembly as de scribed in Note loa. 2, If universal joint being removed is a re placement joint, remove lock rings from bearings. On original universal joints, the injected nylon ring will shear off when bearing is removed. 3. Support yoke or bearing trunnion on vise jaws, position Bearing Remover, J-4l74, over end of bearing cup, and pound on Remover Tool with a hammer until bearing is driven out of yoke and into Remover Tool about 1/2 inch, Fig NOTE: is used. removing 4. Place Bearing Remover with bearing in vise. Tighten vise until bearing is held securely by tool, then drive yoke away from tool until bearing is removed, Fig Repeat steps 3 and 4 on other bearings. Remove and discard universal joint cross. b. Installation Only one size universal joint bearing Use Bearing Remover, J-4174, for bearings. 1. Start one bearing and seal assembly into propeller shaft yoke by tapping lightly with a hammer, being careful not to dislocate needles in bearing. 2, Inspect seal retainers on new universal joint cross and replace if damaged. 3. Check holes in ends of cross arms, making certain they are filled with universal joint grease. 4. Install universal joint cross in position and guide into bearing already started, Fig Installing Universal Joint Bearings 5. Start opposite bearing into propeller shaft yoke and place in vise with jaws against bearings, Fig , Tighten vise until cross is just ready to enter opposite bearing and adjust position of cross until it enters both bearings. 7. Tighten vise until both bearings are in far enough to allow lock rings to be installed. NOTE: If bearings do not go into position with normal pressure on the vise, a needle bearing may have fallen Out of place. Remove bearing and reposition needle, CAUTION: Whenever all needles are re moved from bearing assembly, make certain that ring is installed in bottom of bearing cup before installing needles. 8. Install lock rings, making certain that they are properly seated in groove. 9. Repeat above procedure on remaining bearings. 10. Install propeller shaft assembly as de scribed in Note lob. 13. Front and Rear Propeller Shafts Disassembly and Assembly Figs. 7-2 and 7-18 a. Disassembly 1. Remove propeller shaft assembly as de scribed in Note loa. 2. Pry up center bearing lock retainer. Fig Removing Universal Joint Bearing 3. Back off center bearing retaining nut, using Center Bearing Retaining Nut Remover and In staller, J-21009, and separate front and rear

13 PROPELLER SHAFT AND REAR AXLE 7-13 Fig Propelled Shaft DisQssembled 75 series cars propeller shafts by sliding front shaft off center slip yoke. 4. Remove and discard center bearing lock retainer, 5. Remove center slip yoke seal, split washer, and center bearing retaining nut from slip yoke. Discard seal and split washer. b. Assembly 1. Clean inner spline of front propeller shaft and spline of center slip yoke. 2. Install center bearing retaining nut on slip yoke with threaded end toward front propeller shaft, 3. Install new split washer, being sure to slide washer securely against inner shoulder of retain ing nut. 4. Slide new slip yoke seal over center slip yoke and into retaining nut. 5. Install new center bearing lock retainer on center slip yoke. 6. Coat inner spline of front propeller shaft and spline of center slip yoke with center bearing slip yoke lubricant available from factory Parts Warehouses. 7. Slide center slip yoke and rear propeller shaft into front propeller shaft spline. 8. Tighten center bearing retaining nut to 55 foot-pounds using Center Bearing Retaining Nut Remover and Installer J and a 100 footpound torque wrench, Fig CAUTION: Particular care should be taken in application of torque wrench and installer tool, to prevent over-torquing the nut. Hold torque wrench perpendicular to installer tool to cancel off-set error on torque reading. 9. Bend edge of center bearing lock retainer in two places to lock center bearing retaining nut. 10. Install propeller shaft assembly as de scribed in Note lob. 14. Propeller Shaft Center Bearing Removal and Installation a. Removal 1. Remove propeller shaft assembly as de scribed in Note loa. 2, Disassemble front and rear propeller shafts as described in Note 13a. 3. Remove center bearing support and bracket assembly from front propeller shaft by tapping on front side of assembly with a soft head hammer. 4. Remove slinger from end of propeller shaft. 5, Pry out snap ring from front of bearing and remove bearing from support bracket by tapping lightly from rear with a soft head hammer.

14 7-14 PROPELLER SHAFT AND REAR AXLE b. Installation 1, Press bearing into support bracket, using care not to damage bearing or support, and secure bearing in support bracket with snap ring. 2, Pack front and rear face of center bearing with heavy duty water pump grease. 3. Install slinger on front propeller shaft. 4. Position center bearing support assembly on rear of front propeller shaft with snap ring facing front end of shaft, and tap entire assembly on to front shaft until it fits securely against inward edge of shaft. Fig Tightening Center Bearing Retaining Nut 5. Assemble front and rear described in Note 13b. 6. Install propeller shaft scribed in Note lob, propeller shafts as assembly as de TORQUE SPECIFICATIONS Material Number Application Size Foot-Pounds 300-M Brake Backing Plate to Axle Housing Bolts Commercial Chassis 7/ M Brake Backing Plate to Axle Housing Nuts 60, 62, and Seventy-Five Series 3/ Special Axle Shaft Hub Nut Commercial Chassis 1-1/ Special Differential Carrier to Axle Housing Nuts 3/ Special Pinion Shaft Nut 7/8-14 Notes 2b, 3b- Step M Pinion Flange to Universal Joint Flange Attaching Screws 60 and 62 Series 7/ M U-Bolt Nuts Seventy-Five Series and Commercial Chassis 5/ Special Propeller Shaft Center Bearing Retaining Nut 1-9/ O-M Center Bearing Support Bolts 60 and 62 Series 5/ O-M Center Bearing Support Bolts Seventy-Five Series and Commercial Chassis 3/ M Wheel Mounting Nuts 1/ NOTE: Refer to Back of Manual, Page 17-1, for Bolt and Nut Markings and Steel Classifications.

15 PROPELLEIR SHAFT AND REAR AXLE 7-15 A B C D E 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 Installer B J..257l.2 Pinion Nut Adapter K J-2lOlO Rear Wheel Bearing Oil C J Slide Hammer Seal Remover D J..8l3l Rear Axle Shaft Puller L J-2lOll Rear Wheel Bearing Oil E J-.21l13 Pinion Oil Seal Installer Seal Installer F J--4l74 Universal Joint Bearing M J-86l4-l Pinion Flange Holding Remover Tool G J Center Bearing Retaining Nut N J-21O44 Adapter 2 req d. use with Remover and Installer J-8614-l H J-2986-l Rear Wheel Bearing Plate 0 J Rear Axle Pinion Flange and Pin Assembly I J Rear Wheel Bearing Holding Tool - P Q J-6544 J Puller Pinion Yoke Holding Tool Rear Axle Pinion Yoke Puller

16 7-16 PROPELLER SHAFT AND REAR AXLE SPECIFICATIONS Item All Series Unless 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 of Wheel Bearing Inner-race - 60, 62, and 75 Series Cars 3-7/32" Gear Ratio 60 and 62 Series Cars except cars equipped with an Air Conditioner 2, and 62 Series Cars when equipped with an Air Conditioner also optional on all 60 and 62 series cars Seventy-Five Series Cars standard and when equipped with an Air Conditioner Commercial Chassis - Standard optional on Seventy-Five series cars