GM Service Manual Online
For 1990-2009 cars only

Checks

Causes

Input Carrier Assembly (52)

Inspect thrust washers, pinion gears, and pins for wear or damage.

Input Sun Gear (53)

Inspect for damaged sun gear.

1-2-3-4 and 3-5-R Clutch Assembly (51)

Inspect for worn or damaged clutch bearing (428).