GM Service Manual Online
For 1990-2009 cars only

Removal Procedure

Tools Required

    • J 42066 Rear Hub Holding Tool
    • J 6125-1B Slide Hammer
    • J 23129 Axle Boot Remover
    • J 36797-A Getrag Axle Output Shaft Seal Installer

    Object Number: 159587  Size: SH
  1. Remove the transmission mount. Refer to Transmission Mount .
  2. Remove the propeller shaft coupling bolts.
  3. Remove the propeller shaft coupling from flange. Use a screwdriver to pry propeller shaft coupling away from flange.

  4. Object Number: 159588  Size: MH
  5. Install the J 42066 onto the drive flange using nuts and bolts supplied with tool.
  6. While holding the J 42066 and using a 30 mm deepwell socket to remove the flange nut.
  7. Discard the nut.

  8. Object Number: 174778  Size: SH
  9. Remove the drive flange (49) from transmission output shaft.

  10. Object Number: 174779  Size: SH
  11. Using the J 6125-1B and the J 23129 remove the case extension seal (50) from the transmission (43).

  12. Object Number: 159595  Size: SH
  13. Remove the catalytic converter support bracket bolts (1) and bracket.

  14. Object Number: 174777  Size: SH
  15. Disconnect the transmission speed sensor electrical connector.
  16. Remove the transmission speed sensor bolt and sensor with seal. Use hand pressure to twist sensor while pulling outward. Do not pry on sensor.

  17. Object Number: 174780  Size: SH
  18. Remove rear oxygen sensor harness clips (112) from the case extension.
  19. Remove the case extension bolts (52).
  20. Remove the case extension (43).
  21. Remove the case extension gasket (42).

Installation Procedure


    Object Number: 174780  Size: SH
  1. Install the new case extension gasket (42).
  2. Install the case extension (43).
  3. 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.

  4. Install the case extension bolts (52).
  5. Tighten
    Tighten the bolts to 32 N·m (23 lb ft).

  6. Install the rear oxygen sensor harness clips (112) to the case extension.

  7. Object Number: 174777  Size: SH
  8. Install the transmission speed sensor seal (44), sensor (45) and the bolt (46).
  9. Tighten
    Tighten the speed sensor bolt to 9 N·m (78 lb in).

  10. Connect the transmission speed sensor electrical connector.

  11. Object Number: 159595  Size: SH
  12. Install the catalytic converter support bracket bolts (1) and bracket.

  13. Object Number: 175292  Size: SH
  14. Using the J 36797-A install the new seal (50) into the case extension.

  15. Object Number: 174778  Size: SH
  16. Install the drive shaft flange, washer, and the new nut onto the output shaft.

  17. Object Number: 159588  Size: MH
  18. Install the J 42066 onto the drive flange using nuts and bolts supplied with tool.
  19. 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.

  20. While holding the J 42066 and using a 30 mm deepwell socket to tighten the flange nut.
  21. Tighten
    Tighten the drive flange nut to 100 N·m (74 lb ft).


    Object Number: 159587  Size: SH
  22. Install the propeller shaft coupling to drive flange.
  23. Install the propeller shaft coupling bolts.
  24. Tighten
    Tighten the propeller shaft coupling bolts to 95 N·m (70 lb ft).

  25. Install the transmission mount. Refer to Transmission Mount .
  26. Inspect and adjust the transmission fluid level. Refer to Transmission Fluid Check .