GM Service Manual Online
For 1990-2009 cars only

Check

Causes

DEFINITION: A large engine RPM increase is noted with little or no vehicle rearward speed increase during the following conditions:

    â€¢ The engine is running.
    â€¢ The transmission is in Reverse range.
    â€¢ The vehicle is stopped or moving slowly.
    â€¢ The vehicle brakes are not applied.
    â€¢ The throttle is opened 25 percent or greater.

Direct and Reverse Clutch Assembly

    â€¢ Damaged reverse clutch housing ball check valve
    â€¢ Damaged or cut piston
    â€¢ Damaged or worn clutch plates

Control Valve Body Accumulator Assembly

    â€¢ Reverse lockout valve stuck
    â€¢ TCC PWM solenoid valve leaking

Selector Lever

Adjustment