The rear axle bearings that are used on a 1955 to 1964 are a “press- on” style ball bearing. The bearing supports the axle in the rear end housing and also serves as the seal and axle retainer. An O-ring around the outside of the bearing seals to the rear end housing, while a lip seal is located on the outside face of the bearing that keeps rear end lube inside the housing. When an axle bearing starts to leak (usually because the bearing cage is disintegrating) the rear end lube will ruin the rear brake shoes. If the bearing becomes loose, it will start to roar and possibly ruin the axle and/or rear end housing. In this article we will show the proper way to remove and install new rear axle bearings.
Important Notes on Disassembly and Assembly (cont’d.)
To fit the 5th gear to the main shaft, the gear should be heated up to approx. 600° C using a hot air blower. When disassembling the gear shift cover make sure to mark the shift forks and to set the shift segments and the shift lever in neutral position.
Further detailed instructions on “dismantling and assembling of the gear shift cover” are contained in the Sierra RS Cosworth Workshop Manual. Before fitting the transmission extension, the cranked selector lever with détend ball and spring have to be fitted.
The rear axle is attached to the body by support arms (1), a torque arm (2) and a torque arm frame (3). A panhard rod (4) is also installed between the rear axle and the crossmember, while an anti-roll bar (5) is mounted between the support arms.
The following final drive ratios are available: 3.31:1, 3.54:1, 3.73:1, 3.91:1, and 4.10:1. The unit is of the hypoid bevel type, in which the shape of the spiral gear teeth permits the pinion to be located below the centre of the crown wheel (ring gear) affording quieter operation and stronger teeth. Power is transmitted by rolling and sliding action between the teeth under high pressure.
On A/T models, right axle shaft must be removed to remove left axle shaft. On all models, cover axle shaft boots with shop towel to prevent damaging boots. Always use NEW snap rings, circular clips and boot clamps during reassembly and installation. Replace axle shaft oil seal in differential before installing axle shaft.
REMOVAL OF ORIGINAL AXLE SHAFTS:
STEP #1 : Drain the axle differential fluid by removing the rear differential cover.
STEP #2: Verify that you DO NOT have a PowerLock differential. This one-piece axle Kit WILL NOT fit your vehicle if you have a PowerLock differential. If your differential has 4 spider gears, 2 side gears, and the differential case is bolted together, then you have a PowerLock unit. If you do not have a PowerLock unit, then you may continue.
STEP #3: Loosen all of your rear wheel lug nuts. Raise and support your vehicle with a jack and jack stand supports. Remove both wheels from the vehicle.
Vehicle identification data
Type plate and vehicle identification number
The type plate -A- is located at the rear bulkhead of the engine compartment behind the coolant reservoir.
Vehicles for certain export countries have no type plate.
The vehicle identification number -B- (chassis number) is stamped on the rear bulkhead in the engine compartment.
Vehicle data sticker
The vehicle data sticker is located in the spare wheel well at the rear of the vehicle.
General Motors has decided to conduct a Voluntary Emission Recall involving certain 2001-03 Chevrolet Silverado and GMC Sierra model vehicles, equipped with a 4.3L V6 (RPO L35 – VIN W or RPO LU3 – VIN X) engine. The ignition distributor cap and rotor in these vehicles may corrode and cause ignition system failure. This condition may result in rough engine idle, misfire, stalls, engine cranks but does not run and/or illumination of the Malfunction Indicator Lamp (MIL).
Front axle components, overview
Load bearing components and parts of the suspension must not be welded or straightened.
Vehicles without drive axle must not be moved, or wheel bearing will be damaged. If vehicle does have to be moved, always note the following points:
- Install an outer joint in place of the drive axle.
- Tighten outer joint to 115 Nm (M14 bolt) or 190 Nm (M16 bolt).
Step 1. Jacking & Support of Car
Note: If you are using an automotive lift, parts a & b may be skipped.
a). To raise the front of the car, (depending on the jack you use) you may need to initially raise the car from the side (using the secondary jack) to gain clearance for the hydraulic jack at the front of the car. Once this is done, support the car with the jack stands located on the frames cross member as shown in Figure 1.
b). With the front of the car supported, now raise the rear of the car. This is done with the jack positioned from the side of the car. The jacking point will be the rear axle or differential housing. Once the rear of the car is in the air, supoport it with the other two jack stands, on the car’s subframe as shown in Figure 2 and Figure 3. You may wish to place a block of wood between the jack stand and subframe to avoid any scatches.
The XJR and XJ8 uses an independent coil spring-type rear suspension. Outer bearing carrier and hub assembly is supported by control arm at bottom, and utilizes axle shaft as upper support. Suspension is controlled by 2 coil spring/shock absorber assemblies. Fulcrum shafts are used to connect control arms to chassis and hub carrier.