2ND Clutch Assembly: Inspection

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Inspect 2nd clutch housing for the following:
- Leaking or damaged ball check valve. Turn housing to seat check ball. Using ATF, check for leaking or damaged check ball valve in 2nd clutch housing. If check ball assembly leaks, replace check ball assembly. See 2ND CLUTCH HOUSING CHECK BALL VALVE .
- Scored or worn bushings.
- Discolored band surface or wear on drum caused by excess heat.
- Flatness of band surface on drum.
- Damaged reverse reaction drum splines.
- Cracks in welds.
Replace components as necessary. See Figure.

NOTE: This step has been revised due to ATRA TSB No. 579, dated November 2000.

Check for damaged reverse reaction drum splines. See Figure. Original 2nd clutch and reverse reaction drums have splines with 25-degree sides and have tendency to strip. New design 2nd clutch and reverse reaction drum kit (GM P/N 24213402) have splines with 10-degree sides. Check for cracks in welds. Inspect backing plate and waved plate for cracks and heat spots. Inspect steel and composition plates for wear, lining separation, pitting, flaking or damage. See Figure.
Inspect apply ring and spring assembly for damage. Inspect piston and piston seals for damage. Inspect 2nd clutch housing for damaged inner piston seal. See Figure.