Chevette L4-98 1.6L (1982)
Clutch: All Technical Service Bulletins
A/T - THM 180/180C Slipping or No Upshift
Number:
87-119
Section:
7A
Date:
APRIL, 1987
Subject:
SLIPPING OR NO UPSHIFT - BURNED
SECOND CLUTCH
Model and Year:
1977-87 CHEVETTE WITH THM 180/180C
TRANSMISSION
FIGURE 1 - THM 180/180C TRANSMISSION IDENTIFICATION INFORMATION
FIGURE 2
TO:
ALL CHEVROLET DEALERS
A 1977 through 1987 THM 180/180C transmission (refer to Figure 1) may exhibit a slipping or no upshift condition due to a burned second clutch. The
burned second clutch may be due to distortion of the valve body spacer plate which results in loss of second clutch apply pressure. The valve body
spacer plate may become distorted when the vacuum pipe fitting (refer to Figure 2) becomes blocked by carbon at the engine intake manifold. As the
