GM Service Manual Online
For 1990-2009 cars only

    Object Number: 64126  Size: SH

    Caution: Wear safety glasses in order to avoid eye damage.

  1. Using clean solvent, clean the flywheel.
  2. Using compressed air, dry the flywheel.
  3. Inspect the flywheel for loose or improperly installed balance weights (manual transmission only). A properly installed balance weight should be installed until flush with, or below, the face of the flywheel.

  4. Object Number: 188086  Size: SH
  5. Inspect the flywheel for the following :
  6. • Pitted surface (manual transmission only) (1)
    • Scoring or grooves (manual transmission only) (2)
    • Rust or other surface damage (manual transmission only)
    • Stress cracks around the flywheel-to-crankshaft bolt hole locations
    • Loose or improperly positioned ring gear. The ring gear has an interference fit onto the flywheel and should be positioned completely against the flange of the flywheel (manual transmission only).

       Important: Do not attempt to repair the welded areas that retain the ring gear to the flywheel plate. Install a new flywheel.

    • Welded areas that retain the ring gear onto the flywheel for cracking (automatic transmission only)
    • Damaged ring gear teeth (4)