GM Service Manual Online
For 1990-2009 cars only

1-2 Shift Shudder

Checks

Cause

Second Clutch

    â€¢ Worn fiber plates
    â€¢ Leaking check valve ball
    â€¢ Cut seal
    â€¢ Damaged steel plates
    â€¢ Mispositioned snap ring

Driven Sprocket Support

    â€¢ Damaged seal rings
    â€¢ Refer to Causes of Low Oil Pressure