C 1500 Truck 2WD V8-350 5.7L (1989)
Clutch: Customer Interest
A/T - Direct Clutch Premature Wear
Number:
90-357-7A
Section:
7A
Date:
October 1990
Corp. Bulletin No.: 077134
Subject:
DIRECT CLUTCH DISTRESS
Model and Year:
1985-90 C, K, P, R, V TRUCKS AND G VAN WITH 3L80 AND 3L80-HD AUTOMATIC TRANSMISSION
Figure 1
TO:
ALL CHEVROLET DEALERS
BULLETIN COVERS:
Some HYDRA-MATIC 3L80/3L80-HD models experienced Direct Clutch distress. This distress was caused by an oil leak in the clutch apply circuit at
the Center Support joint between the Case and the Center Support. A new Center Support (654), Case Assembly (10), Piston (650) and Bolt (79)
eliminated this root cause for Direct Clutch distress.
DATE OF PRODUCTION CHANGE: (Figure 1)
Beginning March 1, 1990 (Julian Date 060) all 1990 HYDRA-MATIC 3L80/3L80-HD transmissions were built with the new Center Support (654),
Case Assembly (10), Intermediate Piston (650) and Bolt (79).
Figure 2
