GM Service Manual Online
For 1990-2009 cars only

    Object Number: 412463  Size: SH

    Important: In order to maintain the proper component balance, contact surface taper, and heat transfer, manual transmission flywheels are NOT to be machined.

  1. Clean the flywheel in solvent.
  2. Caution: Wear safety glasses in order to avoid eye damage.

  3. Dry the flywheel with compressed air.

  4. Object Number: 412117  Size: SH
  5. Inspect the manual transmission flywheel for the following:
  6. • Damaged ring gear teeth
    • 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.
    • A scored, grooved or damaged friction surface

    Object Number: 412119  Size: SH
  7. Inspect the automatic transmission flywheel for the following:
  8. • Damaged ring gear teeth
    • Stress cracks around the flywheel-to-crankshaft bolt hole locations
    • Weight saving holes

    Caution: Refer to Shop Practices Caution in the Preface section.


    Object Number: 895481  Size: SH
  1. Clean the flywheel.
  2. Dry the flywheel with compressed air.

  3. Object Number: 894934  Size: SH
  4. Inspect the manual transmission flywheel for the following:
  5. • Damaged ring gear teeth
    • 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.
    • A scored, grooved, or damaged friction surface

    Object Number: 894936  Size: SH
  6. Inspect the automatic transmission flywheel for the following:
  7. • Damaged ring gear teeth
    • Stress cracks around the flywheel-to-crankshaft bolt hole locations and weight saving holes