Corsica V6-191 3.1L (1990)
Valve Body: All Technical Service Bulletins
Pedals - Buzz on Light Throttle Application
Number:
91-61-7A
Section:
7A
Date:
August 1990
Corp. Bulletin No.: 077126
Subject:
PEDAL BUZZ AT ZERO TO LIGHT THROTTLE IN FORWARD GEAR RANGES
Model and Year:
1990-91 CAVALIER, CORSICA, BERETTA WITH 3.1L (VIN CODE T) ENGINE
TO:
ALL CHEVROLET DEALERS
BULLETIN COVERS:
A new Spacer Plate (20 with a smaller 1-2 accumulator orifice which will reduce the potential for pedal buzz. This pedal buzz is noticeable at zero to
light throttle in forward gear ranges caused by unstable operation of the 1-2 accumulator valve.
DATE OF PRODUCTION CHANGE:
This new Spacer Plate will go into production in all "K" and "U" model HYDRA-MATIC 3T40 transaxles on July 30, 1990 (Julian Date 211).
SERVICE PROCEDURE:
To service any HYDRA-MATIC 3T40 for a pedal buzz condition, replace the (existing) spacer plate with a new spacer plate which contains the smaller
1-2 accumulator orifice.
SERVICE PARTS INFORMATION:
Refer to the following part numbers whenever ordering this new spacer plate.
Parts are currently available from GMSPO.
SERVICE MANUAL REFERENCE:
Whenever service to the Spacer Plate or valve body assembly is necessary, refer to the HYDRA-MATIC 3T40 Unit Repair Section of your service
manual.
