GM Service Manual Online
For 1990-2009 cars only

Tools Required

    • J 44809 Seal Installer
    • J 44915 Seal Installer

    Object Number: 630685  Size: SH
  1. Use the J 44809  (2) in order to install the right axle shaft oil seal (1).

  2. Object Number: 630686  Size: SH
  3. Use the J 44809  (2) in order to install the left axle shaft oil seal (1).

  4. Object Number: 630673  Size: SH
  5. Lubricate the O-ring seal (4) and oil seal (2) sealing surface with gear oil GM P/N 12378514.
  6. Install the O-ring seal (4) into the groove of the pinion housing (3).
  7. Use the J 44915  (1) in order to install the oil seal (2) into the pinion housing (3).

  8. Object Number: 630670  Size: SH
  9. Install the pinion and housing assembly (1) and shim (2) to the differential  (3).

  10. Object Number: 630669  Size: SH

    Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

  11. Install the bolts (1) to the differential.
  12. Tighten
    Tighten the bolts to 10 N·m (106 lb in).


    Object Number: 630652  Size: SH
  13. Install the torque tube (1) to the differential (2).

  14. Object Number: 630651  Size: SH
  15. Install the bolts (1) to the differential.
  16. Tighten
    Tighten the bolts to 25 N·m (18 lb ft).


    Object Number: 630649  Size: SH

    Important: DO NOT tighten the bracket nut and bolt (1 and 7) at this time. The bracket bolt and nut are to be tightened after the differential assembly is installed into the proper position in the vehicle.

  17. Install the spacers (3 and 6) to the tube flanges.
  18. Install the bracket (4), bolt (7), washers (2 and 8) and nut (1) to the tube.

  19. Object Number: 630684  Size: SH
  20. Install the O-ring seals (1 and 2) onto the clutch pump check valve (3).
  21. Install the valve (3) and bolts (4 and 5) to the differential.
  22. Tighten
    Tighten the valve bolts to 10 N·m (106 lb in).


    Object Number: 630655  Size: SH
  23. Install the vent hose assembly (1) and clamp (2) to the differential (3).

  24. Object Number: 630671  Size: SH
  25. Install the oil drain plug (2) and gasket to the differential.
  26. Tighten
    Tighten the drain plug to 30 N·m (22 lb ft).