Inspection Procedure

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Fig 1: Cross Sectional View Of Inspection Areas In Input Clutch Housing

Courtesy of GENERAL MOTORS CORP.

Inspect the input clutch housing assembly (632) for the following:
- Plugged feed passages
- Worn or damaged splines
- Input shaft bushing (631) wear
- Seal ring groove nicks or burrs
- Cracks or blocked fluid passages in the input shaft
- Damage or wear to the thrust bearing (723) in the input clutch housing
With the ball check valve assembly in its seated position in transmission fluid, inspect the assembly for leaks.

Fig 2: Inspection Areas On Input Clutch Piston Components

Courtesy of GENERAL MOTORS CORP.

Inspect the input clutch piston (636) for the following:
- Cracks or damage to seal grooves
- Wear on piston lugs
Inspect the input clutch spring and retainer assembly (637) for a damaged cage and distorted or missing springs.
Inspect the third clutch piston housing (639) for damage.
Inspect the third clutch spring retainer and guide assembly (643) for a damaged cage and distorted or missing springs.

IMPORTANT: Do not attempt to reuse the third clutch piston and seal assembly.

Replace the third clutch piston and seal assembly (642).

Fig 3: View Of Input Shaft Thrust Bearing Assembly

Courtesy of GENERAL MOTORS CORP.

Inspect the input shaft thrust bearing assembly (644) for damage or wear.