GM Service Manual Online
For 1990-2009 cars only

Condition

Possible Cause

High or low shift points

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