GM Service Manual Online
For 1990-2009 cars only

Converter Clutch Apply, Rough, Slips, or Shudders

Checks

Cause

Control Valve Assembly

Stuck regulator valve in the converter clutch

Turbine Shaft

    • Damaged or missing seals
    • Damaged or unseated blow off checkball for the converter clutch

Channel Plate

Regulator valve in the converter clutch

Drive Sprocket Support

Worn bushing

Torque Converter

Worn or glazed fiber material (replace the converter)