GM Service Manual Online
For 1990-2009 cars only

Checks

Causes

Case Assembly (50)

    • Inspect for cracked or broken Case (50)
    • Inspect for stripped or sheared splines
    • Inspect for missing Lube Orifice Plug
    • Inspect for binding Manual Shift Detent Lever Assembly (609)
    • Inspect for missing Manual Shift Shaft Pin (611)
    • Inspect for missing Manual Shaft Lever Pin (610)
    • Inspect for interference or binding Park Pawl Actuator Assembly (607)
    • Inspect for broken or disengaged 1-2-3-4 Clutch Backing Plate Retainer Ring (561)
    • Inspect for loose or damaged case bushing

Drive Link Lubrication Scoop (55)

Inspect for leaking, damaged or missing Drive Link Lube Scoop Seals (59)

Torque Converter (28)

    • Inspect for stripped or sheared splines on Turbine Shaft
    • Inspect for missing Torque Converter to Flywheel bolts
    • Inspect for damaged or disengaged Torque Converter Hub to Oil Pump Drive Gear

Torque Converter Housing (208)

    • Inspect for stripped or sheared Differential Ring Gear splines
    • Inspect for broken or disengaged Differential Ring Gear Retainer (206)
    • Inspect for loose, missing or broken Torque Converter and Differential Housing bolts (26)
    • Inspect for loose, missing or broken Fluid Pump bolts (200)

35R/456 Housing Assembly (516)

    • Inspect for damaged or broken Input Shaft Thrust Bearing Assembly (538)
    • Inspect for stripped or sheared splines on the Input Shaft to the 3-5 Reverse/4-5-6 Clutch Housing (516)

Oil Pump Assembly (201)

    • Inspect for fluid leaks / improper fluid level
    • Inspect for leaking Fluid Outlet Seal Assembly (24)
    • Inspect for loose or missing Oil Pump Bolts (200)
    • Inspect for damaged, restricted or improperly installed Oil Filter Assembly (203)
    • Inspect for damaged or leaking Oil Filter Neck Seal

Low & Reverse Clutch Assembly (543)

Inspect for stripped or sheared splines to the Reaction Carrier (567)

Input Carrier Assembly (570)

    • Inspect for stripped or sheared castle splines to ring gear
    • Inspect for improperly installed carrier pinion gear pins
    • Inspect for damaged or broken Pinion Gears
    • Inspect for stripped or sheared splines on the Input Sun Gear (571)
    • Inspect for damaged or broken Output Internal Gear
    • Inspect for broken or disengaged Output Internal Gear Retainer Ring
    • Inspect for damaged or broken Input Carrier Thrust Bearing Assembly (568) and Output Carrier Thrust Bearing Assembly (573)
    • Inspect for damaged or broken Input Carrier Thrust Bearings (569, 572)

Reaction Carrier Assembly (567)

    • Inspect for stripped or sheared Reaction Carrier Assembly (567) splines
    • Inspect for damaged or broken Input Carrier Thrust Bearings (568)
    • Inspect for damaged or broken Pinion Gear teeth
    • Inspect for damaged or broken Reaction Internal Gear teeth
    • Inpsect for disengaged or broken Reaction Internal Gear retainer ring

Reaction Sun Gear Assembly (566)

    • Inspect for damaged or broken weld at Sun Gear
    • Inspect for loose or worn Reaction Sun Gear Assembly bushing

Output Carrier Assembly (574)

    • Inspect for stripped or sheared splines to reaction internal ring gear
    • Inspect for damaged or broken Input Sun Gear Thrust Bearings (572)
    • Inspect for damaged or broken Pinion Gear teeth
    • Inspect for damaged or broken Input Carrier Thrust Bearings (573)
    • Inspect for broken or damaged Output Internal Gear

Output Sun Gear Assembly (555)

    • Inspect for stripped or sheared Output Sun Gear Assembly (555) splines
    • Inspect for broken Output Sun Gear Assembly (555) hub or weld

Low-Reverse and 1-2-3-4 Clutch Housing (551)

Inspect for disengaged or broken 1-2-3-4 Clutch Piston Spring Retainer (554)

Drive Link Assembly (225)

    • Inspect for broken, worn or damaged Drive Link Assembly (225)
    • Inspect for broken, worn or damaged Drive Sprocket (224)
    • Inspect for broken, worn or damaged Driven Sprocket Assembly (229)
    • Inspect for broken Drive Gear Hub (222)

Differential Carrier Assembly (232)

    • Inspect for stripped or sheared splines on Differential Side Gear
    • Inspect for stripped or sheared splines Final Drive Sun Gear (230)
    • Inspect for stripped or sheared splines Differential Carrier to PTU (AWD only)
    • Inspect for stripped broken or disengaged Final Drive Retainer (581)
    • Inspect for damaged or broken Pinion Gear teeth
    • Inpsect for damaged or broken Final Drive Rollers (585)
    • Inspect for broken, worn or damaged Final Drive Inner and Outer Thrust Washers (584)