Rear Cover and Gasket Replacement

REMOVAL PROCEDURE





1. Raise and support the vehicle. Refer to Vehicle Lift Points.
2. Support the differential with a transmission jack (1).
3. Remove the ABS sensor connectors (2).





4. Remove the differential support bracket bolts (1) from the differential support bracket (2).





5. Remove the rear differential bushing bolts (1) from the differential.
6. Lower the differential slightly.

IMPORTANT: The differential may be lowered slightly (4 to 5 inches) without the removal of the drive axles or the propeller shaft from the differential. This provides sufficient clearance to remove the rear axle housing cover.

7. Place a drain pan underneath the differential.





8. Remove the rear axle housing cover bolts (1).





9. Remove the rear axle housing cover from the rear axle housing.
10. Clean the sealing surfaces on the rear axle housing.
11. Clean the sealing surfaces on the rear axle housing cover.
12. Remove the ABS sensor bolts from the cover.
13. Remove the ABS sensors from the cover.

INSTALLATION PROCEDURE





1. Install the ABS sensors to the cover.
2. Install the ABS sensor bolts to the cover.
^ Tighten the ABS sensor bolts to 7 Nm (62 inch lbs.).

NOTICE: Refer to Fastener Notice in Service Precautions.

3. Coat the sealing surfaces uniformly with sealant, GM P/N 12346141 or equivalent.
4. Install the rear axle housing cover to the rear axle housing.





5. Install the rear axle housing cover bolts (1).
^ Tighten the rear axle housing cover bolts (1) to 60 Nm (44 ft. lbs.).

6. Raise the differential into place.





7. Install the differential support bracket bolts (1) to the differential support bracket (2).
^ Tighten the differential support bracket bolts to 90 Nm (66 ft. lbs.) + 38°.





8. Install the rear differential bushing bolts (1) to the differential.
^ Tighten the rear differential bushing bolts (1) to 100 Nm (74 ft. lbs.).





9. Install the ABS sensor connectors (2).
10. Remove the transmission jack (1).
11. Refill the rear axle with proper lubricant. Refer to Lubricant Level Check.
12. Lower the vehicle.
13. Test drive the vehicle.
14. Inspect the vehicle for leaks.