GM Service Manual Online
For 1990-2009 cars only

To determine and correct a torque converter vibration, use the following general procedure to achieve the best possible torque converter-to-flywheel balance. Refer to Transmission Replacement for detailed procedure steps as appropriate.

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

  1. Disconnect the battery.
  2. Raise the vehicle. Refer to Lifting and Jacking the Vehicle.
  3. Remove the starter motor bolts and position the starter motor aside. Refer to Starter Motor Replacement.

  4. Object Number: 702519  Size: SH
  5. Remove the torque converter bolts.

  6. Object Number: 686680  Size: SH
  7. Rotate the torque converter one bolt position.
  8. Caution: Refer to Fastener Caution in the Preface section.

  9. Install the torque converter bolts and tighten to 60 N·m (44 lb ft).
  10. Install the starter motor and starter motor bolts. Refer to Starter Motor Replacement.
  11. Warning: Refer to Battery Disconnect Warning in the Preface section.

  12. Connect the battery.
  13. Start the vehicle and test for vibration again. If vibration is still present, repeat the testing procedure. Repeat this procedure until you obtain the best possible balance.