GM Service Manual Online
For 1990-2009 cars only

Component

Inspect

External Linkage

Not adjusted properly

Valve Body Assembly

    • 4-3 sequence valve stuck
    • Checkball incorrectly positioned
    • Spacer plate or gaskets are incorrect, incorrectly assembled or damaged

Input Clutch Assembly

    • Turbine shaft oil passages plugged or not drilled
    • Turbine shaft seal rings damaged
    • Turbine shaft sealing balls loose or missing
    • Turbine shaft sealing balls loose or missing
    • Porosity in forward or overrun clutch piston
    • Overrun piston seals cut or damaged
    • Overrun piston checkball not sealing