GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 1999 🢒 GMC K Pickup - 4WD 🢒 Engine 🢒 Engine Mechanical - 7.4L 🢒 Engine Flywheel Cleaning and Inspection
  1. Clean the engine flywheel in solvent.

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

  2. Dry the engine flywheel with compressed air.

    3. Object Number: 64126 Size: SH
  3. Inspect the manual transmission engine flywheel for loose or improperly installed balance weights.

    4. A properly installed balance weight should be installed until flush or below flush with the face of the engine flywheel.


    Object Number: 188086 Size: SH
  4. Inspect the manual transmission engine flywheel for the following conditions:
    5. • 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.

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

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

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