GM Service Manual Online
For 1990-2009 cars only

    Object Number: 20789  Size: SH
  1. Clean the governor assembly (4) in solvent.
  2. Inspect the governor for the following:
  3. • A blocked oil passage
    • Damaged springs
    • Missing ball valves
    • Binding weights
  4. Inspect the governor drive gear for the following:
  5. • Damaged teeth
    • Teeth wear
    • Burrs
  6. Inspect the speed sensor rotor (801) for nicks, burrs, or damaged teeth.

  7. Object Number: 20792  Size: SH
  8. Hold the governor upside down and pour solvent or Dexron III® into the governor shaft.
  9. Important: During the leak inspection, allow the governor weights to hold the ball valves freely in their seats.

  10. Inspect for leaks around the ball valves.

  11. Object Number: 20791  Size: SH
  12. Affix a new fluid seal (3) onto the governor.
  13. Insert the speed sensor rotor (801) onto the governor.

  14. Object Number: 20793  Size: SH
  15. Install the governor assembly (4) into the case.

  16. Object Number: 20795  Size: SH
  17. Install the governor thrust bearing assembly (6) onto the rotor.
  18. Install a new governor cover seal (7) onto the case.
  19. Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

  20. Position the governor cover (802) onto the case and finger start two bolts (8).
  21. Tighten
    Tighten the bolts to 11 N·m (98 lb in).