A/T - Slipping/No Reverse/Other Concerns After Service
87chevy22Number: 88-61-7A
Section: 7A
Date: OCT., 1987
Subject: SLIPPING OR NO REVERSE/
NO MANUAL 2-1 DOWNSHIFT AFTER SERVICING
Model and Year: 1987-88 PASSENGER CARS AND TRUCKS
WITH THM 700-R4 TRANSMISSIONS
TO: ALL CHEVROLET DEALERS
Service package P/N 8657906, containing both the valve Body and Case Gaskets, may contain an interim design gasket that could cause the following operating characteristics if installed in any 1987-88 THM 700-R4 Transmission:
1. Slipping or no reverse - If installed into a 1987-88 THM 700-R4 transmission without an Auxiliary Valve Body.
2. No manual 2-1 downshift - If installed into a 1987-88 THM 700-R4 transmission with an Auxiliary Valve Body.
Figure 1 - 1987 THM 700-R4 Case And Valve Body Gaskets:
If Service Package P/N 8657906 is used for any 1987-88 THM 700-R4 transmission, first verify that it has the correct Valve Body and Case Gaskets (refer to Figure 1). If the holes identified as 1, 2 and 3 are not visible or are not in the correct location, do not use it and return the package to G.M.S.P.O. Use Service Package P/N 8657938 instead.
8657938 pkg. - Spacer Plate Gaskets