A/T - Revised Spacer Plate
89Chevy16Number: 89-103-7A
Section: 7A
Date: MARCH, 1989
Subject: REVISED SPACER PLATE
Model and Year: 1989 C, G, K, R, V TRUCKS WITH 700-R4 TRANSMISSION
Figure 1 - Spacer Plate - 3-2 High Speed Orifice Removed:
TO: ALL CHEVROLET DEALERS
This bulletin covers a revised spacer plate for the 1989 THM 700-R4/HYDRA-MATIC 4L60 MPM, MWM, MZM, TUM and TXM models (5.7L Truck models). The change in this spacer plate is the removal of the 3-2 high speed orifice for optimum 3-2 downshift timing (refer to Figure 1). No changes were made to other calibration items.
Figure 2 - THM 700-R4/HYDRA-MATIC 4L60 Transmission Identification Information:
DATE OF PRODUCTION CHANGE: (Figure 2)
Beginning December 15, 1988 (Julian Date 350), the 1989 5.7L Truck models were built with the revised spacer plate.
SERVICE PARTS INFORMATION:
The part number for this spacer plate did not change. The physical appearance changed due to the removal of the 3-2 high speed orifice.
The revised spacer plate can be used to service any 1989 THM 700-R4/HYDRA-MATIC 4L60 MPM, MWM, MZM, TUM, or TXM model.
Part Number Description
8673139 Spacer Plate - 1989 Models: 9MPM, 9MWM, 9MZM,
9TUM, 9TXM
Parts are currently available from GMSPO.