GM Service Manual Online
For 1990-2009 cars only

Tools Required

    • J 22813-A Axle Bearing Remover and Installer (7.6 inch Axle)
    • J 2619-01 Slide Hammer
    • J 23689-A Axle Shaft Seal and Bearing Remover
    • J 8614-01 Flange/Pulley Holding Tool
    • J 22536 Pinion Driver

    Object Number: 392774  Size: SH
  1. Remove the rear axle fill plug.

  2. Object Number: 390113  Size: SH
  3. Remove the rear axle drain plug.
  4. Drain the lubricant into a suitable container.
  5. Inspect the drain plug for excessive metal particle accumulation. This accumulation is symptomatic of extreme wear.

  6. Object Number: 341650  Size: SH
  7. Remove the rear axle housing cover bolts (1).
  8. Remove the rear axle housing cover (2) from the axle housing.

  9. Object Number: 661077  Size: SH
  10. Measure the amount of torque required to rotate the pinion. Use an inch-pound torque wrench. Record this measurement for reassembly. This will give the combined preload for the following components:
  11. • The pinion bearings
    • The pinion seal
    • The carrier bearings
    • The axle bearings
    • The axle seals

    Object Number: 788905  Size: SH
  12. Draw an alignment mark between the pinion stem and the pinion flange/yoke.

  13. Object Number: 661080  Size: SH
  14. Install the J 8614-01 as shown.
  15. Remove the pinion nut while holding the J 8614-01 .
  16. Remove the washer.

  17. Object Number: 661074  Size: SH
  18. Install the J 8614-2 (2) and the J 8614-3 (3) into the J 8614-01  (1) as shown.
  19. Remove the pinion yoke by turning the J 8614-3 (3) clockwise while holding the J 8614-01  (1).

  20. Object Number: 156409  Size: SH
  21. Remove the pinion shaft locking bolt.

  22. Object Number: 156410  Size: SH
  23. On axles without a locking differential, remove the pinion shaft.

  24. Object Number: 156411  Size: SH
  25. On axles with a locking differential, remove the shaft part way. Rotate the case until the pinion shaft touches the housing.

  26. Object Number: 156412  Size: SH
  27. On axles with a locking differential, use a screwdriver, or a similar tool, in order to enter the differential case and rotate the lock (1) until the lock aligns with the thrust block (2).
  28. Push the flange of the axle shaft toward the differential.

  29. Object Number: 9774  Size: SH
  30. Remove the lock from the button end of the axle shaft.
  31. Remove the axle shaft from the housing.

  32. Object Number: 707827  Size: SH
  33. For axles with drum brakes, remove the axle shaft seal and the bearing from the axle housing using the J 22813-A (7.6 inch axle)  or the J 23689-A (8.6 inch axle) (1) and the J 2619-01  (2).

  34. Object Number: 688157  Size: SH
  35. For axles with disc brakes, remove the axle shaft seal and the bearing from the axle housing using the J 22813-A (7.6 inch axle)  or the J 23689-A (8.6 inch axle) (1) and the J 2619-01  (2).

  36. Object Number: 667502  Size: SH
  37. Remove the bearing caps and bolts. Mark the bearing caps left and right.
  38. Notice: When removing the differential case from the axle housing, do not damage the cover gasket surface. If the cover gasket surface is damaged, lubricant may leak from the axle and cause premature failure of the axle assembly.


    Object Number: 9730  Size: SH
  39. Remove the differential by prying the differential from the axle housing at the differential window.
  40. Remove the bearing cups, the shims, and the spacers as necessary.
  41. Mark the cups and shims left and right and in the proper order as necessary. Place the cups and the shims with the bearing caps.


    Object Number: 683960  Size: SH
  42. Install the J 22536 as shown.
  43. Ensure that the or the is firmly seated on the pinion.

  44. Drive the pinion out using the J 22536 and a hammer.
  45. Strike the J 22536 slowly. Do not let the pinion fall out of the rear axle housing.

  46. Remove the pinion oil seal. Use a suitable seal removal tool. Do not damage the housing.

  47. Object Number: 9731  Size: SH
  48. Remove the collapsible spacer from the pinion. Discard the spacer.
  49. Remove the drive pinion bearing cups from the axle housing using a hammer and a brass drift in the slots provided. Move the drift back and forth between one side of the cup and the other in order to work the cups out of the housing evenly.