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 drive flange. Refer to Drive Flange and Seal Replacement .
  2. Remove the catalytic converter support bracket bolts (1) and bracket.
  3. Remove the transmission mount. Refer to Transmission Mount .

  4. Object Number: 174777  Size: SH
  5. Disconnect the speed sensor electrical connector.
  6. Remove the speed sensor retainer bolt.
  7. Remove the speed sensor with the seal. Use hand pressure to rotate the sensor back and forth while pulling outward. Do not pry on the sensor.

  8. Object Number: 174780  Size: SH
  9. Remove rear oxygen sensor harness clips (112) from the case extension.
  10. Remove the transmission case extension bolts (52).
  11. Remove the transmission case extension (43).
  12. Remove the transmission case extension gasket (42).

Installation Procedure


    Object Number: 174780  Size: SH
  1. Install the new transmission case extension gasket (42).
  2. Install the transmission 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 transmission case extension bolts (52).
  5. Tighten
    Tighten the transmission case extension 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 speed sensor seal (44) and sensor (45).
  9. Install the speed sensor retainer bolt (46).
  10. Tighten
    Tighten the speed sensor retainer bolt to 9 N·m (78 lb in).

  11. Connect the transmission speed sensor electrical connector.

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

  15. Object Number: 174778  Size: SH
  16. Install the drive flange. Refer to Drive Flange and Seal Replacement .
  17. Install the transmission mount. Refer to Transmission Mount .
  18. Inspect and adjust the transmission fluid level. Refer to Transmission Fluid Check .