Camaro RS V8-305 5.0L VIN E TBI (1990)
Clutch: All Technical Service Bulletins
A/T - Material Change for Clutch Apply Plates
Number:
90-189-7A
Section:
7A
Date:
March 1990
Corporate Bulletin No.:077109
Subject:
CLUTCH APPLY PLATES - MATERIAL CHANGE TO POWDERED METAL IN FORWARD AND 3-4 CLUTCHES
Model and Year:
1990 ALL CARS, TRUCKS, VANS WITH 4L60 (700-R4) AUTOMATIC TRANSMISSION
Figure 1
This bulletin covers a material change for the forward and 3-4 clutch apply plates. These clutches will now contain apply plates manufactured from
powdered metal instead of steel.
The following dates show when changes went into effect:
(Figure 1)
Apply Plate
Start of Production Date
Forward
January 25, 1990 (Julian Date 025)
3-4
January 29, 1990 (Julian Date 029)
The new powdered metal plates are interchangeable with the current steel plates. Dimensions of the new powdered metal plates are the same as the steel
plates. Powdered metal plates will appear darker in color than previously produced steel plates.