GM Service Manual Online
For 1990-2009 cars only

Checks

Causes

Torque Converter Assembly (1)

Diagnose torque converter for possible internal damage.

Fluid Pump Cover Assembly (219)

    • Inspect for worn, damaged, or sticking converter feed limit valve (220) and spring (221).
    • Inspect for worn, damaged, or sticking TCC control valve (227) and spring (226).
    • Inspect for damaged stator shaft.

Control Valve Lower Body Assembly (307)

Inspect for worn, damaged, or sticking torque converter clutch (TCC) regulator apply valve (355).

4-5-6 (w/ Turbine Shaft) Clutch Assembly (56)

    • Inspect for damaged turbine shaft.
    • Inspect for damaged turbine shaft O-ring seal.