GM Service Manual Online
For 1990-2009 cars only

Checks

Causes

3-5 Reverse Clutch Assembly

    • Inspect for damaged, stripped or sheared splines on 3-5 Reverse Clutch Plates (507-509), Backing Plate (510)
    • Inspect for sheared or stripped splines on 3-5 Rev/4-5-6 Housing (516) to Turbine Shaft (517)
    • Inspect for damage, improper surface finish, porosity, deformed or unbalanced 3-5 Rev/4-5-6 Housing (516)
    • 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 (516)
    • Inspect for failure of the Input Shaft Thrust Bearing (538)
    • Inspect for disengaged or broken 3-5 Reverse Clutch Backing Plate (511)
    • Inspect for damaged, worn or leaking 3-5 Reverse Clutch Piston Seals (504-506)
    • Inspect for damaged or broken 3-5 Rev/4-5-6 Clutch Housing (516)
    • Inspect for warped, damaged, improper surface finish or debonding 3-5 Reverse Clutch Piston (502)
    • Inspect for broken or fatigued 3-5 Reverse Clutch Spring (503)
    • Inspect for disengaged or broken Speed Sensor Reluctor Retainer (500)
    • Inspect for worn, broken or damaged Speed Sensor Reluctor Wheel (501)

Reaction Sun Gear Assembly (566)

Inspect for stripped or sheared splines

Reaction Carrier (567)

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

Output Carrier (574)

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