GM Service Manual Online
For 1990-2009 cars only

Component

Inspect

Converter

Internal damage

Oil Pump

Stator shaft sleeve scored or off location

Valve Body Assembly

    • 2-3 Shift valve train stuck
    • Spacer plate or gaskets are incorrect, incorrectly assembled or damaged
    • 2-3 accumulator valve stuck
    • Face not flat

Input Housing Assembly

    • 3-4 clutch or forward clutch plates worn
    • Excessive clutch plate travel
    • Cut or damaged 3-4 clutch or forward clutch piston seals
    • Porosity in input clutch housing or piston
    • 3-4 clutch piston check ball stuck, damaged or not sealing
    • Restricted apply passages
    • Forward clutch piston retainer and ball assembly not seating
    • Sealing balls loose or missing

Case

3rd accumulator retainer and ball assembly not seating

2-4 Servo Assembly

2nd apply piston seals missing, cut or damaged