Caprice Wagon V8-307 5.0L (1987)
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New cast aluminum reverse input clutch piston (607) with 2.057 mm (.081") orifice
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Reverse input clutch waved plate (611) replaced by a "belleville" plate
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Thinner reverse input clutch fiber plates (612) thickness now is 1.73-1.88 mm (.068-.074"); was 1.93-2.13 mm (.076-.084")
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Selective reverse input clutch backing plate (613)
FIG. 4 - OIL PUMP COVER
New oil pump cover assembly (217) changed as follows: (Figure 4)
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Larger diameter reverse input feed hole in stator hub
SERVICE ACTION:
Component parts of the new reverse and input housing and drum assembly are available through the G.M. Service Parts Organization (GMSPO) catalog.
These parts cannot be used with parts from transmissions built prior to February 9, 1987 (Julian Date 040).
SERVICE PARTS INFORMATION:
Part Number Description
8663068
Reverse Input Clutch Housing And Drum Assembly Complete
8663071
Reverse Input Clutch Piston
8657922
Reverse Input Clutch Seal Package
8663079
Reverse Input Clutch Plate Assembly
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* * * * * Pump Cover Assembly (Refer to GMSPO Catalog for Part Numbers and Model Usage)
Backing Plate - Reverse Input Clutch