GM Service Manual Online
For 1990-2009 cars only

Checks

Causes

Front Differential Drive Pinion Gear Assembly (23)

    • Inspect for proper Taper Roller Bearing Pre-load
    • Inspect for loose or worn transfer Driven Gear

Differential Assembly (486)

    • Inspect for proper Taper Roller Bearing Pre-load
    • Inspect for worn or damaged Side Gear Thrust Washer (492) or Pinion Gear Thrust Washer (488)
    • Inspect for loose or worn Side Gear Axle Splines

Input Carrier Assembly (470)

    • Inspect for worn or damaged Pinion Gear Thrust Washers and Bushings
    • Inspect for worn or damaged Pinion Gears, Pins or Needle Bearings
    • Inspect for loose Hub and Ring Gear

Output Carrier Assembly (474)

    • Inspect for worn or damaged Pinion Gear Thrust Washers and Bushings
    • Inspect for worn or damaged Pinion Gears, Pins or Needle Bearings
    • Inspect for loose Hub and Ring Gear

Reaction Carrier Assembly (467)

    • Inspect for worn or damaged Pinion Gear Thrust Washers and Bushings
    • Inspect for worn or damaged Pinion Gears, Pins or Needle Bearings
    • Inspect for loose hub and Ring Gear

Fluid Pump Assembly (203)

    • Inspect for proper fluid level
    • Inspect for loose or worn Drive Link Assembly (218)
    • Inspect for worn Driven Sprocket Thrust Washer (214) or Drive Sprocket Thrust Washers (219, 220)
    • Inspect for leaking Transfer Drive Gear Support Seal (213), Pump Fluid Outlet Seal Assembly (57) or Filter Seal (202)
    • Inspect for worn or damaged Fluid Pump Shaft Splines

3-5-Reverse Clutch Assembly

    • Inspect for inadequate Clutch Plate Clearance
    • Inspect for loose or worn Clutch Plate Splines (423-425)
    • Inspect for loose or worn Clutch Spring Retainer (427)
    • Inspect for loose Speed Sensor Reluctor Wheel (416) or Retainer (415)

4-5-6 Clutch Assembly

    • Inspect for inadequate Clutch Plate Clearance
    • Inspect for loose or worn Clutch Plate Splines (449, 440)
    • Inspect for loose or worn Clutch Spring Retainer (442)
    • Inspect for loose or worn 3-5-Reverse/4-5-6 Clutch Housing Bushing

1-2-3-4 Clutch Assembly

    • Inspect for inadequate Clutch Plate Clearance
    • Inspect for loose or worn Clutch Plate Splines (456-458)
    • Inspect for loose or worn Clutch Spring Retainer (459)

Low and Reverse Clutch Assembly (OWC) (455)

    • Inspect for loose or worn Splines (455)
    • Inspect for loose or worn Retainer (454)

Low and Reverse Clutch

    • Inspect for inadequate Clutch Plate Clearance
    • Inspect for loose or worn Clutch Plate Splines (449-452)
    • Inspect for loose or worn Clutch Spring Retainer (410)

2-6 Clutch Assembly

    • Inspect for inadequate Clutch Plate Clearance
    • Inspect for loose or worn Clutch Plate Splines (445-447)
    • Inspect for loose or worn Clutch Spring Retainer (407)

Case Assembly (51)

    • Inspect for loose or broken Transmission Mount Bolts
    • Inspect for loose Torque Converter and Differential Housing Bolts (26)
    • Inspect for loose or broken Fluid Trough Bolts (56)