GM Service Manual Online
For 1990-2009 cars only

Probable Cause

Action

The transmission contains an excessive amount of fluid.

  1. Check the transmission fluid level.
  2. Adjust the transmission fluid level as necessary.

Refer to Transmission Fluid Level Inspection .

The transmission vent or vent hose is plugged.

Clear or replace the transmission vent or vent hose.

Refer to Transmission Vent Tube Replacement .

The transmission has worn or damaged shaft to case seals.

  1. Remove the transmission.
  2. Refer to Transmission Replacement .

  3. Inspect the following transmission seals for wear or damage:
  4. • Output shaft inner and outer seals
    • Input shaft seal
    • Shift shaft inner and outer seals

Refer to Transmission Disassemble in the Transmission Unit Repair Manual.