GM Service Manual Online
For 1990-2009 cars only

Inspection Procedure

  1. Start the engine with the manual selector in the PARK position.
  2. Note any abnormal vibration while engine is at idle.
  3. Move the shift selector to NEUTRAL and note any abnormal vibration.
  4. Return the shift selector lever to the PARK position.
  5. Turn the ignition switch off.
  6. Raise the vehicle. Support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
  7. Remove the following items from the transmission:
  8. • The two flywheel inspection cover bolts
    • The four bolts from one case left stiffener
    • The flywheel inspection cover
  9. Remove the three flywheel-to-torque converter bolts.
  10. Rotate the torque converter 120 degrees (1/3 turn).
  11. Notice: Refer to Fastener Notice in the Preface section.

  12. Install the three flywheel-to-torque converter bolts.
  13. Tighten
    Tighten the flywheel-to-torque converter bolts to 65 N·m (48 lb ft).

  14. Install the flywheel inspection cover.
  15. Secure the flywheel inspection cover with two bolts.
  16. Tighten
    Tighten the flywheel inspection cover bolts to 10 N·m (89 lb ft).

  17. Install the left case stiffener.
  18. Secure the left case stiffener with four bolts.
  19. Tighten
    Tighten the left case stiffener bolts to 60 N·m (44 lb ft).

  20. Install the flywheel inspection plug .
  21. Lower the vehicle.
  22. Start the engine with the manual selector in the PARK position.
  23. Repeat this procedure until the best possible balance is obtained if any abnormal vibration still exists.