GM Service Manual Online
For 1990-2009 cars only

TCC Slip (100 RPM)

Checks

Causes

Valve Body Assembly (60)

    â€¢ TCC/PWM solenoid leaks
    â€¢ Regulator apply valve or converter clutch shift valve sticking or side loading

Oil Pump Assembly (4)

    â€¢ Stator shaft bushings worn, due to scratched turbine shaft journal (replace bushings and input housing assembly)
    â€¢ TCC apply valve is stuck open
    â€¢ TCC solenoid leaking

Input Housing and Turbine Shaft Assembly (621)

    â€¢ Scratched journal on turbine shaft
    â€¢ Turbine shaft O-ring cut
    â€¢ Turbine shaft hole not drilled to full depth