Beretta V6-173 2.8L (1989)
Pressure Plate: All Technical Service Bulletins
M/T - Difficult Shift Effort/Gear Clash in all Gears
Number:
90-302-7C
Section:
7C
Date:
July 1990
Corp. Bulletin No.: 037302 R
Subject:
MANUAL TRANSMISSION CLUTCH SLIPPAGE
Model and Year:
1989-90 CAMARO, CAVALIER, BERETTA AND CORSICA WITH MANUAL TRANSMISSION
TO:
ALL CHEVROLET DEALERS
This bulletin is applicable for all 1989-90 model year F, J, L, with manual transmissions.
Note:
For F-Cars in all model years, this applies to V-6 engines only.
FOR F-CARS ONLY
This bulletin should be used for 1989-1990 model year F-cars in conjunction with Dealer Service Bulletin No. 91-34-7C.
CONDITION:
Some owners of the above vehicles equipped with manual transmission may comment about difficult shift effort or gear clash in all gears with the clutch
pedal fully depressed.
CAUSE:
This reduced clutch disengagement may be the result of the clutch pressure plate cover to flywheel bolts working loose.
CORRECTION:
In order to assist diagnosis and repair, it is suggested that the following diagnostic procedures be used:
A.
Prior to removing the pressure plate, check for obvious hydraulic system leaks. Inspect the hydraulic linkage for any cracks, leaks, or loose
mounting flange bolts. Check the fluid level in the master cylinder reservoir. A low level may indicate a system leak or an under filled condition.
Important:
Slight dampness under the clutch master cylinder boot, slave cylinder, or tube fitting do not necessarily indicate a leaking condition,
as there is a silicon lubricant present on the hydraulic clutch assembly.
If the hydraulic system does not show signs of leakage and the fluid level is correct, then the source of the clutch condition is located within the clutch
housing and is most likely the reduction of pressure plate bolt torque.
B.
Check the pressure plate bolts for looseness. If the bolts are not torqued properly, they should be removed ONE-AT-A-TIME, inspected for
damage, and reinstalled. When reinstalling the original or new clutch cover bolts (P/N 14004016), the torque should be 20 N-m. (14.7 lbs.ft.) plus
30 degrees and a lock washer (P/N 11500191) should be installed with each bolt. Reference Section 7C of the applicable Service Manual for
specific clutch installation, removal, and inspection instructions.
Parts are currently available from G.M.S.P.O.
Use applicable labor operation and time.
