GM Service Manual Online
For 1990-2009 cars only

Special Tools

J 42055 Transmission Support Fixture

Removal Procedure

    Warning: Refer to Battery Disconnect Warning in the Preface section.

  1. Disconnect the negative battery cable.
  2. Raise and suitably support the vehicle. Refer to Lifting and Jacking the Vehicle.
  3. Remove the rear tire and wheel assemblies. Refer to Tire and Wheel Removal and Installation.

  4. Object Number: 180606  Size: SH
  5. Remove the rear shock absorber lower mounting bolts.
  6. Remove the 2  transaxle mount to rear crossmember nuts.

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

  14. Object Number: 1747269  Size: SH
  15. Remove the 2  transaxle mount to differential bolts for the appropriate mount that will be replaced.
  16. Remove the appropriate transaxle mount from the vehicle.

Installation Procedure


    Object Number: 1747269  Size: SH
  1. Install the transaxle mount to the vehicle.
  2. Caution: Refer to Fastener Caution in the Preface section.

  3. Install the transaxle mount to differential bolts and tighten to 50 N·m (37 lb ft).

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

  7. Using ONLY HAND TOOLS, install NEW rear suspension crossmember mounting nuts and tighten to 110 N·m (81 lb ft).
  8. Remove the transmission jack from the rear suspension crossmember.
  9. Release the J 42055 from the transmission, then remove the J 42055 and transmission jack.
  10. Install the 4 transaxle mount to rear suspension crossmember nuts and tighten to 50 N·m (37 lb ft).

  11. Object Number: 180606  Size: SH
  12. Install the rear shock absorber lower mounting bolts and tighten to 220 N·m (162 lb ft).
  13. Install the rear tire and wheel assemblies. Refer to Tire and Wheel Removal and Installation.
  14. Lower the vehicle.
  15. Connect the negative battery cable. Tighten the negative battery cable bolt to 15 N·m (11 lb ft).
  16. Program the transmitters. Refer to Transmitter Programming.