GM Service Manual Online
For 1990-2009 cars only

Checks

Cause

Torque Converter (1)

    • Loose lug bolts
    • Out of balance
    • Internal failure

Transmission/Engine

Misaligned

Case Extension (19)

Output shaft support bushing is worn.

Reaction and Output Gear Sets

Flats on gear teeth or teeth improperly machined

Oil Pan

Dented