GM Service Manual Online
For 1990-2009 cars only

Engine and Transmission Mount Balancing - All Mounts W/Automatic Transaxle

Important: Follow the balance procedure in the order listed in the following steps. Powertrain mounts must be tightened in sequence.

  1. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.

  2. Object Number: 891595  Size: SH
  3. Loosen the front transmission mount through bolt. Do not remove.

  4. Object Number: 892053  Size: SH
  5. Loosen the rear transmission mount through bolt. Do not remove.
  6. Position two floor jacks with wood blocks under the engine and transmission to support the powertrain assembly.

  7. Object Number: 891639  Size: SH
  8. From the engine compartment, loosen the transmission mount to transmission bolts.

  9. Object Number: 891691  Size: SH
  10. Loosen the engine mount to intermediate bracket bolts.
  11. Reposition the floor jacks to allow a 1/8 inch gap between the mount and mount bracket.
  12. Notice: Refer to Fastener Notice in the Preface section.


    Object Number: 891639  Size: SH
  13. Tighten the transmission mount to transmission bolts using the following sequence:
  14. 8.1. Rear bolt
    8.2. Middle bolt
    8.3. Front bolt

    Tighten
    Tighten the bolts to 55 N·m (41 lb ft).


    Object Number: 891691  Size: SH
  15. Tighten the engine mount to intermediate bracket bolts starting with the center bolt.
  16. Tighten
    Tighten the bolts to 55 N·m (41 lb ft).

  17. Remove the floor jacks.
  18. Shake the powertrain vigorously from front to rear and allow the powertrain to settle.

  19. Object Number: 892920  Size: SH
  20. Tighten the rear transmission mount through bolt.
  21. Tighten
    Tighten the bolts to 90 N·m (66 lb ft).


    Object Number: 891595  Size: SH
  22. Tighten the front transmission mount through bolt.
  23. Tighten
    Tighten the bolts to 60 N·m (44 lb ft).

  24. Lower the vehicle.

Engine and Transmission Mount Balancing - All Mounts W/Manual Transaxle

Important: Follow the balance procedure in the order listed in the following steps. Powertrain mounts must be tightened in sequence.

  1. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.

  2. Object Number: 891625  Size: SH
  3. Loosen the front transmission mount through bolt. Do not remove.

  4. Object Number: 891629  Size: SH
  5. Loosen the rear transmission mount through bolt. Do not remove.
  6. Position two floor jacks with wood blocks under the engine and transmission to support the powertrain assembly.

  7. Object Number: 891639  Size: SH
  8. From the engine compartment, loosen the transmission mount to transmission bolts.

  9. Object Number: 891691  Size: SH
  10. Loosen the engine mount to intermediate bracket bolts.
  11. Reposition the floor jacks to allow a 1/8 inch gap between the mount and mount bracket.
  12. Notice: Refer to Fastener Notice in the Preface section.


    Object Number: 891639  Size: SH
  13. Tighten the transmission mount to transmission bolts using the following sequence:
  14. 8.1. Rear bolt
    8.2. Middle bolt
    8.3. Front bolt

    Tighten
    Tighten the bolts to 55 N·m (41 lb ft).


    Object Number: 891691  Size: SH
  15. Tighten the engine mount to intermediate bracket bolts starting with the center bolt.
  16. Tighten
    Tighten the bolts to 55 N·m (41 lb ft).

  17. Remove the floor jacks.
  18. Shake the powertrain vigorously from front to rear and allow the powertrain to settle.

  19. Object Number: 891629  Size: SH
  20. Tighten the rear transmission mount through bolt.
  21. Tighten
    Tighten the bolts to 60 N·m (44 lb ft).


    Object Number: 891625  Size: SH
  22. Tighten the front transmission mount through bolt.
  23. Tighten
    Tighten the bolts to 55 N·m (41 lb ft).

  24. Lower the vehicle.