GM Service Manual Online
For 1990-2009 cars only

Tools Required

    • J 42162 Getrag Axle Side Gear Compressor
    • J 42170 Getrag Axle Bearing Race Installer
    • J 42173 Getrag Axle Ring Gear Holder

    Object Number: 1256681  Size: SH

    Important: Friction discs and separator plates develop specific wear patterns. During disc and plate installation, the components must be installed in the specific order in which they were removed.

  1. Install the right clutch pack to the right case.
  2. • Install the separator plates (4).
    • Install the friction discs (3).
    • Install the friction disc (thick) (2).
    • Install the bellville washer (1).

    Object Number: 58616  Size: SH
  3. Install the right output shaft and gear (3), side gears (1), and washers (2) to the right differential case.

  4. Object Number: 58612  Size: SH
  5. Using the J 42162 and a hydraulic press, compress the bellville washer and clutch pack in order to install the cross pin to the right differential case.

  6. Object Number: 354426  Size: SH
  7. Using an M8 bolt for alignment, properly position the cross pin into the right differential case. The hole in the pin (2) must align with the hole in the case. During final assembly of the case halves, the pin retaining bolt (1) must be able to pass through the hole in the cross pin.
  8. With the pin and case aligned, release the pressure from the press and remove the J 42162 and bolt.

  9. Object Number: 58607  Size: SH
  10. Install the gear to the left intermediate shaft.

  11. Object Number: 63464  Size: SH
  12. Install the C-clip to the left intermediate shaft.

  13. Object Number: 63596  Size: SH
  14. Using the J 42170 and a hydraulic press, install the left side bearing to the differential.

  15. Object Number: 1256684  Size: SH

    Important: Friction discs and separator plates develop specific wear patterns. During disc and plate installation, the components must be installed in the specific order in which they were removed.

  16. Install the left clutch pack to the left case.
  17. • Install the separator plates (1).
    • Install the friction discs (2).
    • Install the friction disc (thick) (3).
    • Install the bellville washer (4).

    Object Number: 58602  Size: SH
  18. Install the left intermediate shaft and gear to the left case.

  19. Object Number: 58600  Size: SH
  20. Assemble the case halves.
  21. 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.

  22. Install the case bolts.
  23. Tighten
    Tighten the bolts to 55 N·m (41 lb ft).


    Object Number: 63595  Size: SH
  24. Using the J 42170 and a hydraulic press, install the right side bearing to the differential.

  25. Object Number: 1852864  Size: SH
  26. Install the ring gear (1) to the differential. Use several bolts to properly align the ring gear to the case.
  27. A hammer and brass punch may be used to aid in seating the ring gear onto the differential case.

    Important: Two types of ring gear bolts may be available for replacement. First design bolts (3) have serrations under the head and are torqued to 195 N·m (144 lb ft). The second design (4) are smooth under the head and are torqued to 145 N·m (107 lb ft).

  28. Install the NEW ring gear bolts (2).

  29. Object Number: 1041927  Size: SH
  30. Position the differential assembly onto the J 42173 .
  31. Tighten
    Tighten the ring gear bolts to 195 N·m (144 lb ft) - 1st design.

    Tighten
    Tighten the ring gear bolts to 145 N·m (107 lb ft) - 2nd design.