G 10 Van V8-379 6.2L DSL (1987)
the same stack-up as a six plate clutch assembly and to draw heat away from the fiber plates. When assembling the 3-4 clutch, refer to
Figures 13, 13A and 14 for proper assembly.
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New 3-4 clutch apply plate "stepped" replacing a "flat" apply plate (Figure 13)
^
Input housing and shaft assembly revised with longer housing splines for using the new 3-4 clutch apply plate
^
New input internal gear with longer splines on outside diameter
^
Eliminate usage of longer 3-4 clutch apply ring (now only using short 3-4 clutch apply ring on all models)
^
New 3-4 backing plates, (material and thickness)
^
New internal retaining ring (thinner) and end configuration changed for identification
SERVICE ACTION:
The new 3-4 clutch apply plate or the new input housing and shaft assembly cannot be used on transmissions built prior to February 9, 1987 (Julian Date
040).
SERVICE PARTS INFORMATION:
Part Number Description
8642173
Plate, 3-4 Clutch
8667423
3-4 Clutch Apply Plate
8667661
Input Housing & Shaft Assembly (621) (used with 245 mm converter)
8667659
Input Housing & Shaft Assembly (621) (used with 298 mm converter)
8667660
Input Housing & Shaft Assembly (621) (used with 298 mm converter
MHM model only)
8663636
Internal Retaining Ring
8663639
Input Internal Gear
