K 2500 Truck 4WD V8-379 6.2L DSL VIN C FI (1989)
Clutch: All Technical Service Bulletins
A/T - New Low and Reverse Clutch Waved Plate
GMC NUMBER:
91-7A-64
GROUP:
7A Automatic Transmission
DATE:
February, 1991
CORPORATE
NUMBER:
077148
SUBJECT:
LOW AND REVERSE CLUTCH (NEW WAVED PLATE)
MODELS:
1987-91 C/K, R/V, S/T TRUCKS, G, L, M VANS W/4L60 AUTOMATIC TRANSMISSION
Figure 2 - Lo And Reverse Clutch Waved Plate
SERVICE INFORMATION (Figure 2)
Low and Reverse Clutch failure can be caused by case casting flash interfering with clutch plate travel. A new wave plate is now available which will
alleviate this condition. This new plate can be used to service any Hydra-matic 4L60 transmission produced after February 9, 1987 (Julian Date 040).
When installing the new wave plate, check for any case flash that may be present in the low and reverse grooves, and use a metal file to remove. See
Figure 2 for case location information.
SERVICE PARTS INFORMATION
Description
New Part
Plate-Low and Reverse (wave)
8676362
Part is currently available from GMSPO.
