Installation Procedure

INSTALL OR CONNECT
^ Tools Required:
- J 29039 Axle Shaft Inner Oil Seal Installer
- J 8092 Driver Handle

1. Position rear axle housing under vehicle with hydraulic floor lack.





2. Two rear coil springs to their proper positions on the rear axle housing spring seats.

Important: When installing the rear coil springs in their spring seats, make sure that the spring end with the stepped portion (landing) is aligned with the stepped portion of the rear axle housing.

3. Both trailing rods to rear axle housing and insert two through bolts (one in each side).
4. Both rear shock absorbers to rear axle housing and insert two through bolts (one in each side).

CAUTION: During rear coil spring installation, raise hydraulic floor jack slowly making sure rear coil springs seat correctly. If rear coil springs become unseated while under pressure during installation, serious bodily injury may result.

5. Slowly raise rear axle housing with hydraulic floor jack until rear coil springs are positioned in tile upper spring seats.





6. Two nuts and washers (one on each side) to rear trailing rod through bolts at rear axle housing.
- Tighten rear trailing rod through bolts and nuts to 90 Nm (66 ft. lbs.).
7. Two nuts and washers (one on each side) to lower rear shock absorber through bolts at rear axle housing.
- Tighten lower rear shock absorber through bolts and nuts to 85 Nm (63 ft. lbs.).





8. Rear axle breather hose to rear axle housing secure with one clamp.








9. Brake fluid pipes and five brake pipe clamps to rear axle housing; secure with five screws.
10. Brake hose to rear axle housing brake hose bracket; secure with E-clip.





11. Apply RTV silicone gasket and sealer to the rear axle housing brake backing plate flanges.





12. Apply RTV silicone gasket and sealer to the differential carrier mating surface on the rear axle housing.





13. Differential carrier into rear axle housing; secure with eight nuts.
- Tighten differential carrier nuts to 55 Nm (41 ft. lbs.).





14. Electrical connector to the rear wheel speed sensor if equipped.
15. Rear wheel speed sensor cover to differential carrier; secure with two bolts if equipped.
- Tighten rear wheel speed sensor cover bolts to 15 Nm (11 ft. lbs.).





16. Rear control arm ball joint boss to differential carrier; secure with four bolts.
- Tighten:
^ Rear control arm ball joint boss bolts to 50 Nm (37 ft. lbs.).
^ Rear control arm through bolts and nuts to 90 Nm (66 ft. lbs.).
17. LSVP load sensing spring bracket to upper control arm; securing with two bolts (if equipped).
- Tighten load sensing spring bracket bolts to 18 to 25 Nm (13.5 to 20.0 ft. lbs.).
18. Remove hydraulic floor jack from under rear axle housing.
19. Raise and suitably support vehicle.

Important: Use the index (reference) marks made in the removal procedure to ensure correct rear propeller shaft installation.





20. Rear propeller shaft into vehicle; secure with four nuts and bolts.
- Tighten rear propeller shaft nuts and bolts to 50 Nm (37 ft. lbs.).
21. Both rear axle shaft inner oil seal protectors into rear axle housing.





22. New rear axle shaft inner oil seals into rear axle housing using J 29039 and J 8092.
23. Apply wheel bearing lubricant to the new seal lip.
24. Both rear axle shafts into rear axle housing.
25. Rear brake drums to rear axle.
26. Bleed rear brakes.
27. Rear tire and wheel assemblies.
28. Apply GM P/N 12346004, or equivalent, to the threaded portion of the rear axle housing drain plug.





29. Rear axle housing drain plug into rear axle housing.
- Tighten rear axle housing drain plug to 25 Nm (18 ft. lbs.).
30. Refill the rear axle housing with approximately 2.2 liters (4.6 pts.) of 80W-90 GL5 lubricant. Oil level should be even with the bottom of the rear axle housing oil level filler plug hole.
31. Rear axle housing oil level/filler plug into rear axle housing.
- Tighten rear axle housing oil level/filler plug to 43 Nm (32 ft. lbs.).
32. Lower vehicle.