GM Service Manual Online
For 1990-2009 cars only

    Object Number: 1401955  Size: SH
  1. Clean the automatic transmission flex plate in solvent.
  2. Dry the flex plate with compressed air.
  3. Inspect the flex plate for the following conditions:
  4. • Damaged ring gear teeth
    • Stress cracks around the flex plate-to-crankshaft bolt hole locations

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

    • Welded areas that retain the ring gear onto the flex plate for cracking

    Object Number: 1199314  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.

  5. Clean the manual transmission flywheel in solvent.
  6. Dry the flywheel with compressed air.
  7. Inspect the flywheel for the following conditions:
  8. • Pitted surface (1)
    • Grooved or scored surface (2)
    • Rusted surface (3)
    • Damaged ring gear teeth (4)
    • 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.
    • Missing, bent, or damaged pressure plate locating pins. The 2 locating pins are installed into the flywheel and spaced 170 degrees apart to ensure proper orientation of the clutch pressure plate to the engine flywheel during assembly.