GM Service Manual Online
For 1990-2009 cars only

Special Tools

    • J 8092 Driver Handle
    • J 22912-B Split-Plate Bearing Puller
    • J 25070 Heat Gun
    • J 45012 Pinion Flange Holder
    • J 45019 Flange and Pinion Cage Remover
    • J 45017 Seal Installer
    • J 45124 Removal Bridge
    • J 46265 Stub Shaft Seal Installer

Removal Procedure

  1. Remove the carrier from the vehicle. Refer to Differential Carrier Assembly Replacement.

  2. Object Number: 1205616  Size: SH
  3. Remove the bolts from the pinion bearing housing.

  4. Object Number: 1204943  Size: SH
  5. Install the J 45019 and slide hammer.

  6. Object Number: 1204944  Size: SH
  7. Using the J 25070 , apply heat around the pinion housing to ease removal.
  8. Remove the J 45019 from the flange.

  9. Object Number: 1204945  Size: SH
  10. Remove the pinion assembly, O-ring, and the shims from the from differential carrier.

  11. Object Number: 1204947  Size: SH
  12. Remove the carrier side cover bolts.
  13. Using the appropriate tool in the pry tabs, remove the carrier side cover.
  14. Remove the O-ring from the side cover.

  15. Object Number: 1204949  Size: SH
  16. Remove the differential assembly from the carrier.

  17. Object Number: 1204950  Size: SH
  18. Remove the right output shaft seal from the cover.

  19. Object Number: 1204953  Size: SH
  20. Using a suitable tool, remove the left output shaft oil seal from the carrier.

Installation Procedure


    Object Number: 1956028  Size: SH
  1. Using the J 46265  (2) and J 8092  (1), install the left output shaft seal.

  2. Object Number: 1204945  Size: SH
  3. Install the selected shims and the NEW O-ring on the pinion housing.
  4. Note: Inspect the bearing housing for nicks and burrs. Remove if necessary.

  5. Apply a light coat of gear lube to the bearing housing to ease installation.

  6. Object Number: 1205612  Size: SH

    Note: Inspect the carrier pinion housing bore for nicks or burrs. Remove if necessary.

  7. Apply a light coat of gear lube into the pinion housing bore of the carrier.
  8. Using the J 25070 , apply heat to the differential carrier.

  9. Object Number: 1205613  Size: SH
  10. Using the two long bolts from J 45019 as guides, align the housing bolt holes to the carrier bolt holes.
  11. Hand tighten the guide bolts.
  12. Applying even pressure, push the housing evenly into the differential housing.
  13. Remove the long bolts.
  14. Caution: Refer to Fastener Caution in the Preface section.


    Object Number: 1205616  Size: SH
  15. Install the pinion housing bolts and tighten to 29 N·m (21 lb ft).

  16. Object Number: 1204949  Size: SH
  17. Install the differential assembly into the differential carrier.

  18. Object Number: 1205622  Size: SH
  19. Lightly lube the outside diameter of the oil seal with axle lube.
  20. Using the J 45017 , install the right output shaft oil seal (21).

  21. Object Number: 1205624  Size: SH
  22. Install a NEW carrier cover O-ring into the groove.
  23. Apply a light coat of gear lube to the O-ring area.
  24. Align the bolt holes and push cover onto the differential carrier evenly.
  25. Start the cover bolts in the holes by hand.

  26. Object Number: 1954965  Size: SH
  27. Install the side cover mounting bolts (1) and tighten to 29 N·m (21 lb ft) in a criss-cross pattern.
  28. Install the drain plug. Refer to
  29. Install the carrier into the vehicle. Refer to Differential Carrier Assembly Replacement.
  30. Fill the differential with fluid. Refer to Front Axle Lubricant Replacement.