GM Service Manual Online
For 1990-2009 cars only

Engine Flywheel Cleaning and Inspection Automatic Transmission

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

  3. Dry the flex plate with compressed air.

  4. Object Number: 381965  Size: SH
  5. Inspect the flex plate for the following conditions:
  6. • Stress cracks around the engine flex plate-to-torque converter mounting bolt hole locations (1) and/or engine flex plate-to-crankshaft (2, 3)

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

    • Cracks at welded areas that retain the ring gear onto the flex plate (4)
    • Damaged or missing ring gear teeth (5)

Engine Flywheel Cleaning and Inspection Manual Transmission

    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 engine flywheel in solvent.
  2. Caution: Wear safety glasses in order to avoid eye damage.

  3. Dry the engine flywheel with compressed air.

  4. Object Number: 188086  Size: SH
  5. Inspect the manual transmission engine flywheel for the following conditions:
  6. • Pitted surface (1)
    • Scoring or grooves (2)
    • Rust or other surface damage (3)
    • Damaged ring gear teeth (4)
    • Loose or improperly positioned ring gear
    • The ring gear has an interference fit onto the engine flywheel and should be positioned completely against the flange of the engine flywheel.