Rear Axle Hub, Bearing, Cup, and/or Seal Replacement

Special Tools CH 49794 Axle Hub Nut Socket CH-50636 Axle Hub Nut Socket DT 50289 Differential Bearing and Hub Seal Installer DT 50290 Wheel Bearing Installer Outer Bearing Cup DT 50291 Wheel Bearing Race Installer-Outer DT 50292 Wheel Bearing Race Installer— Inner J 8092 Universal Driver Handle—3/4 x 10 inchFor equivalent regional tools, refer to Special Tools.Removal Procedure

Note: The wheel speed sensor ring is NOT serviced separately. The hub and wheel speed senor ring are serviced as an assembly. The wheel hub seal must be replaced anytime the wheel hub assembly is removed from the axle housing.

1. Raise the vehicle. Refer to Lifting and Jacking the Vehicle.

2. Remove the tire and wheel assembly. Refer to Tire and Wheel Removal and Installation.Note: In the following service procedure, it is not

necessary to remove the brake caliper from the bracket.

3. Remove the brake caliper bracket. Refer to Rear Brake Caliper Bracket Replacement.

4. Remove the axle shaft. Refer to Rear Axle Shaft and/or Gasket Replacement.

5. Remove the adjuster nut retainer (1).

6. Remove the key.

7. Using the CH 49794 socket or the CH 50636 socket  (1), loosen the adjusting nut.

8. Remove the adjusting nut.

Note: If the oil seal remains on the axle hub, remove the seal using a suitable seal removal tool.

9. Remove the wheel hub/brake rotor assembly (1) from the axle housing.

10. Remove the rotor, if necessary. Refer to Rear Brake Rotor Replacement.

11. Using a suitable seal removal tool, remove the oil seal from the wheel hub.

12. Remove the inner hub bearing.

13. Using a brass drift and a hammer, remove the inner hub bearing cup.

14. Remove the retaining ring from the wheel hub.

15. Using the DT 50291 installer  (2) and the J 8092 handle  (1), remove the outer hub bearing and bearing cup.

Installation Procedure1. Lubricate the following with a light coat of high

melting point EP bearing lubricant:o The outer wheel bearingo The inner wheel bearingo The outer wheel bearing cupo The inner wheel bearing cupo The axle hub spindle

2. Install the outer bearing into the wheel hub.

Note: Drive the outer bearing cup into the wheel hub until it is just past the retaining ring groove. Do not bottom out the bearing assembly in the bore.

3. Using the DT 50290 installer  (2) and the J 8092 handle  (1), install the outer bearing cup into the wheel hub.

Note: Ensure that the retaining ring is fully and evenly seated in the groove.

4. Install the retaining ring into the groove.

Note: Ensure that the outer bearing assembly rotates freely in the hub

5. Using the DT 50291 installer  (2)  and the J 8092 handle  (1), turn the wheel hub over and seat the outer bearing assembly against the retaining ring.

6. Turn the wheel hub over and install the inner bearing cup.

7. Using the DT 50292 installer  (2) and the J 8092 handle  (1), install the inner bearing cup into the wheel hub.

8. Install the inner bearing.

Note: Ensure the seal is fully seated in the hub bore.

9. Using the DT 50289 installer  (2) and the J 8092 handle  (1), install the new oil seal.

10. Install the rotor, if necessary. Refer to Rear Brake Rotor Replacement.

11. Apply a light coat of high melting point EP bearing lubricant to the axle housing spindle.

Note: If the wheel hub assembly does not fully seat itself onto the axle shaft spindle and is removed, the wheel hub seal must be replaced.

12. Install the wheel hub assembly on the axle housing.

13. Install the rear axle adjuster nut (1).

14. Using the CH 49794 socket or the CH 50636 socket  (1), install the adjusting nut to the hub.

15. Adjust the wheel bearings. Refer to Wheel Bearing Adjustment.

16. Install the adjuster nut retainer (1).17. Install the axle shaft. Refer to Rear Axle Shaft

and/or Gasket Replacement.18. Install the brake caliper bracket. Refer to Rear

Brake Caliper Bracket Replacement.19. Install the tire and wheel assembly. Refer to Tire

and Wheel Removal and Installation.20. Inspect and add axle lubricant to the axle

housing, if necessary. Refer to Rear Axle Lubricant Level Inspection.

21. Lower the vehicle.© 2016 General Motors.  All rights reserved.