GM Service Manual Online
For 1990-2009 cars only

Notice: In order to avoid oil pan damage and possible engine failure, insert a block of wood that spans the width of the oil pan bottom between the oil pan and the jack support.

    Important: Before replacing any transmission/transaxle mount due to suspected fluid loss, verify that the source of the fluid is the transmission/transaxle mount, not the engine, transmission/transaxle or accessories.

  1. Raise the transmission/transaxle in order to remove the weight from the transmission/transaxle mount and create slight tension in the rubber.
  2. Observe the transmission/transaxle mount while raising the transmission/transaxle. Replace the transmission/transaxle mount if the transmission/transaxle mount exhibits any of the following conditions:
  3. • The hard rubber surface is covered with heat check cracks.
    • The rubber is separated from the metal plate of the transmission/transaxle mount.
    • The rubber is split through the center of the transmission/transaxle mount.
  4. If there is movement between the metal plate of the transmission/transaxle mount and its attaching points, lower the transmission/transaxle on the transmission/transaxle mount. Tighten the bolts/screws or nuts attaching the transmission/transaxle mount to the frame or transmission/transaxle mount bracket. Refer to Transmission Mount Replacement .
  5. For information on the engine mount, refer to Engine Mount Inspection in Engine Mechanical - 3.8L.