Suburban 1/2 Ton 2WD V8-350 5.7L (1986)
Valve Body: All Technical Service Bulletins
A/T - Evaluating Peened Spacer Plates
Number: 91-396-7A
Section: 7A
Date: AUGUST 1991
Corporate Bulletin No.: 177120
Subject:
EVALUATING PEENED SPACER PLATES
Model and Year:
1982-91 ALL PASSENGER CARS AND TRUCKS WITH AUTOMATIC
TRANSAXLES AND TRANSMISSIONS (EXCEPT GEO)
TRANSMISSIONS APPLICATIONS:
All HYDRA-MATIC Automatic Transmissions and Transaxles
SUBJECT:
Evaluating Peened Spacer Plates (Service Information)
TRANSMISSION MODELS:
All
VEHICLE APPLICATIONS:
All Vehicles Using HYDRA-MATIC Automatic Transmissions and Transaxles
Bulletin Covers:
Some spacer plate peening is considered acceptable and preferred because it can help seat the check ball. This bulletin will help you decide if a spacer
plate needs to be replaced due to a peening condition.
Service Procedure:
The following two procedures can help determine if the spacer plate can be reused. The following must be performed at all check-ball locations.
Figure 1
1. The spacer plate must be inspected 100% for raised material on the opposite side of the check-ball seat (see Figure 1). If the material on the
opposite side is raised, the peening is too severe and the spacer plate must be replaced.
