GM Service Manual Online
For 1990-2009 cars only

Tools Required

J 42055 Transmission Support Fixture

Removal Procedure


    Object Number: 180633  Size: SH

    Caution: Unless directed otherwise, the ignition and start switch must be in the OFF or LOCK position, and all electrical loads must be OFF before servicing any electrical component. Disconnect the negative battery cable to prevent an electrical spark should a tool or equipment come in contact with an exposed electrical terminal. Failure to follow these precautions may result in personal injury and/or damage to the vehicle or its components.

  1. Disconnect the negative battery cable.
  2. Raise and suitably support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
  3. Remove the rear tire and wheel assemblies. Refer to Tire and Wheel Removal and Installation in Tires and Wheels.
  4. Remove the rear leaf spring. Refer to Rear Transverse Spring Replacement in Rear Suspension.
  5. Remove the transaxle mount to rear crossmember nuts.

  6. Object Number: 180637  Size: SH
  7. Assemble the J 42055 .
  8. Install the J 42055 to a transmission jack.
  9. Position and firmly secure the J 42055 with the transmission jack to the transmission.
  10. Position a transmission jack under the rear suspension crossmember and firmly secure the crossmember to the jack.
  11. Using ONLY HAND TOOLS, remove the rear suspension crossmember retaining nuts.
  12. Carefully lower the rear crossmember approximately 37 mm (1.5 in).

  13. Object Number: 71501  Size: SH
  14. Remove the transaxle mount bracket to differential bolts.
  15. Remove the transaxle mount with bracket.

  16. Object Number: 71502  Size: SH
  17. Remove the transaxle mount to bracket nuts.

Installation Procedure


    Object Number: 71502  Size: SH
  1. Install the transaxle mount to the transaxle mount bracket.
  2. 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.

  3. Install the transaxle mount to bracket nuts.
  4. Tighten
    Tighten the transaxle mount to bracket nuts to 59 N·m (43 lb ft).


    Object Number: 71501  Size: SH
  5. Install the transaxle mount with bracket to the differential.
  6. Install the transaxle mount bracket to differential bolts.
  7. Tighten
    Tighten the transaxle mount bracket to differential bolts to 50 N·m (37 lb ft).


    Object Number: 180637  Size: SH
  8. SLOWLY raise the rear suspension crossmember (still firmly attached to a transmission jack), to the vehicle frame rails.
  9. Guide the transaxle mount studs into the slots in the rear crossmember.

  10. Using ONLY HAND TOOLS, install NEW rear suspension crossmember mounting nuts.
  11. Tighten
    Tighten the rear suspension crossmember mounting nuts to 110 N·m (81 lb ft).


    Object Number: 180633  Size: SH
  12. Remove the transmission jack from the rear suspension crossmember.
  13. Release the J 42055 from the transmission, then remove the J 42055 and transmission jack.
  14. Install the transaxle mount to rear suspension crossmember nuts.
  15. Tighten
    Tighten the transaxle mount to rear suspension crossmember nuts to 50 N·m (37 lb ft).

  16. Install the rear leaf spring. Refer to Rear Transverse Spring Replacement in Rear Suspension.
  17. Install the rear tire and wheel assemblies. Refer to Tire and Wheel Removal and Installation in Tires and Wheels.
  18. Lower the vehicle.
  19. Connect the negative battery cable.
  20. Tighten
    Tighten the negative battery cable bolt to 15 N·m (11 lb ft).

  21. Program the transmitters. Refer to Transmitter Programming in Keyless Entry.