GM Service Manual Online
For 1990-2009 cars only

Removal Procedure

    Notice: Broken or deteriorated mounts can cause misalignment and destruction of certain drive train components. When a single mount breaks, the remaining mounts are subjected to abnormally high stresses.

  1. Raise the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
  2. Remove the crossmember to transmission mount bolts. Refer to Transmission Support Replacement

  3. Object Number: 691715  Size: SH
  4. Remove the transmission mount bolts to the transmission.
  5. Raise the transmission using a suitable transmission jack, just enough in order to permit the removal of the mount.
  6. Remove the mount.

Installation Procedure


    Object Number: 691715  Size: SH
  1. Install the rear transmission mount.
  2. Loosely install the mount to transmission bolts.
  3. Lower the transmission.
  4. 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.

  5. Install the crossmember to transmission mount bolts. Refer to Transmission Support Replacement
  6. Tighten
    Tighten the crossmember and transmission bolts to 50 N·m(37 lb ft).

  7. Tighten the transmission mount nuts to 54 N·m(40 lb ft)
  8. Lower the vehicle.