GM Service Manual Online
For 1990-2009 cars only

Checks

Causes

3-5-Reverse Clutch Assembly

    • Inspect for damaged, worn or stripped splines on 3-5-Reverse Clutch Plates (423-426), Backing Plate (426)
    • Inspect for sheared or stripped splines on 3-5-Rev/4-5-6 Housing to Turbine Shaft (422)
    • Inspect for damage, improper surface finish, porosity, deformed or unbalanced 3-5-Rev/4-5-6 Housing (422)
    • Inspect for damaged, worn, loose or seized hub bushing in the 3-5-Rev/4-5-6 Housing
    • Inspect for broken, porous or improper surface finish or plugged oil passages of the 3-5-Rev/4-5-6 Housing (422)
    • Inspect for failure of the Input Shaft Thrust Bearing (32)
    • Inspect for disengaged or broken 3-5-Reverse Clutch Backing Plate Retainer (427)
    • Inspect for damaged, worn or leaking 3-5-Reverse Clutch Piston Seals (419-421)
    • Inspect for damaged or broken 3-5-Rev/4-5-6 Clutch Housing (422)
    • Inspect for warped, damaged, improper surface finish or debonding 3-5-Reverse Clutch Piston (417)
    • Inspect for broken or fatigued 3-5-Reverse Clutch Spring (418)
    • Inspect for disengaged or broken Speed Sensor Reluctor Retainer (415)
    • Inspect for broken Speed Sensor Reluctor Wheel (416)
    • Inspect for seized Input Shaft Thrust Bearing (32)

Reaction Carrier (467)

    • Inspect for broken or disengaged Input Internal Gear Retainer
    • Inspect for stripped or sheared splines on the Input Internal Gear

Output Carrier (474)

Inspect for stripped or sheared splines for the Reaction Internal Ring Gear

4-5-6 Clutch Assembly

    • Inspect for plugged or missing 4-5-6 Piston Dam Oil Feed hole
    • Inspect for leaking 4-5-6 Piston Dam