GM Service Manual Online
For 1990-2009 cars only

Condition

Possible Cause

High or low shift points

    • Low fluid
    • TV cable out of adjustment, binding or damaged
    • Valve body spacer plate or gaskets improper position or damaged
    • Throttle valve binding or sticking
    • Check balls omitted or improper position
    • Torque converter internal damaged
    • Forward clutch piston or seal leaking or damaged
    • Forward clutch input shaft O-rings cut or damaged
    • Direct clutch piston or seal leaking or damaged
    • Incorrect line pressure