A/T - 700R4 New 3-4 Clutch Apply Package

SIL 88-13 (Mar)

THM 700-R4

SUBJECT: New 3-4 Clutch Apply Package

TRANSMISSION MODELS: All Models

CHANGE TO ASSEMBLY COMPONENTS:

NOTICE




Certain transmissions ("A" Models, Figure 14) will have two steel plates stacked together in two places (one in the middle) to provide the same stack-up as a six plate clutch assembly and to draw heat away from the fiber plates. When assemblying the 3-4 clutch, refer to Figures 13, 13A and 14 for proper assembly








- New 3-4 clutch apply plate "stepped" replacing a "flat" apply plate (Fig. 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 and Shaft Assembly (621) (used with 245 mm converter)
8667659 Input Housing and Shaft Assembly (621) (used with 298 mm converter)
8667660 Input Housing and Shaft Assembly (621) (used with 298 mm converter MHM model only)
8663636 Internal Retaining Ring
8663639 Input Internal Gear

3-4 Clutch Backing Plate Selection Procedure (Figure 15)

1. With the input housing and shaft assembly fully assembled, use a feeler gage to measure for correct backing plate travel (Figure 15).

2. Select the proper backing plate to obtain the specified travel (Figure 15).