Tools Required

Important: Ensure that the vehicle rear wheel on the service side is off of the floor.

1. Block the wheels.
2. Raise the rear axle and place the supports under the frame rails. Ensure that the vehicle rear wheels are off the floor. Refer to Lifting and Jacking the Vehicle in General Information.
3. Release the parking brake.
4. Remove the rear tire and wheel assembly. Refer to Tire and Wheel Removal and Installation in Tires and Wheels.
5. Remove the rear axle shaft. Refer to Rear Axle Shaft and/or Gasket Replacement .
6. If equipped with air brakes, remove the rear drum. Refer to Brake Drum Replacement .
7. If equipped with disc brakes, remove the brake caliper. Refer to Rear Brake Caliper Replacement in Disc Brakes.
8. Using J 28721-910 or J 28721-911 , remove the following rear wheel bearing components:

•	The outer nut

•	The nut lock

•	The rear bearing inner nut

9. Remove the rear hub and rotor assembly.
10. If equipped with disc brakes, remove the rear hub from brake rotor. Refer to Rear Brake Rotor Replacement .
11. Remove the rear wheel bearing outer cone assembly.
12. Remove the following components:

•	The rear wheel bearing seal

•	The rear wheel bearing inner cone assembly

Notice: When cleaning wheel bearing components, use only clean mineral spirits. Do not spin-dry the bearing. Bearing components may be damaged if cleaned with the wrong solvent and/or dried by spinning the bearing.

13. Clean the rear wheel bearing cones and the rear hub using clean mineral spirits.
14. Clean the rear brake rotor and the rear axle housing spindle. Use brake parts cleaner or equivalent.
15. Inspect the rear wheel hub. Replace the hub, if damaged.
16. Inspect the rear wheel stud for looseness and damaged threads.
17. Inspect the rear wheel bearing for the following conditions: Refer to Bearings Inspection .
18. Inspect the rear axle spindle for damage.
19. Inspect the rear axle (shaft) flange studs for damaged threads and bends.
20. If equipped with disc brakes, inspect the rear brake rotor for scoring. Refer to Brake Rotor Surface and Wear Inspection in Disc Brakes.
21. If equipped with air brakes, inspect the rear brake drum. Refer to Brake Drum Inspection in Air Drums.

1. Install synthetic lubricant in the following locations:

•	The bearings

•	The rear axle housing tube

•	The inside of the wheel hub

•	The rear wheel hub bearing seal lip

•	The rear axle spindle seal lip contact surface

•	The rear wheel hub bearing inner cone assembly

Important: When installing the new rear wheel bearing inner cone, always replace the rear wheel bearing inner cup.

2. Install the rear wheel bearing inner cone.




Notice: Do not continue to hammer after rear wheel hub bearing seal is fully seated. This may cause damage to the rear wheel hub bearing seal.

3. Apply silicone sealer (RTV), or equivalent, to the OD of the rear wheel bearing seal. The silicone sealer will overcome minor faults in the rear wheel bearing seal bore.
4. Install the rear wheel bearing seal. Perform the following steps:

4.1.	Ensure that the rear wheel hub bearing seal lip faces inward.

4.2.	Use the J 41107 and the J 8092 to install the rear wheel hub bearing seal.

4.3.	If equipped with disc brakes, install the rear hub to the brake rotor. Refer to Rear Brake Rotor Replacement in Disc Brakes.

Important: When installing a new rear wheel bearing outer cone, always replace the rear wheel bearing outer cup.

5. Using the J 36135 install the rear wheel bearing outer cup.
6. Install the rear wheel bearing outer cone. Push the cone firmly into place.



7. If equipped with disc brakes, install the rear hub and rotor assembly. Do not damage the rear wheel bearing seal.
8. Using J 28721-910 or J 28721-911 , install the following rear wheel bearing components:

•	The rear bearing inner nut

•	The nut lock

•	The outer nut

9. If equipped with disc brakes, install the brake caliper. Refer to Rear Brake Caliper Replacement in Disc Brakes.
10. If equipped with air brakes, install rear brake drum. Refer to Brake Drum Replacement in Air Drums.
11. Adjust the rear wheel bearings. Refer to Wheel Bearing Adjustment .
12. Install the rear axle shaft. Refer to Rear Axle Shaft and/or Gasket Replacement .
13. Install the rear tire and wheel assembly. Refer to Tire and Wheel Removal and Installation in Tires and Wheels.
14. Remove the supports from under the frame rails and lower the rear axle. Refer to Lifting and Jacking the Vehicle in General Information.
15. Remove the wheel blocks.