Campaign - Transaxle Servo Cover Piston Bore: Overview

9216chevy15

Number: 90C34

Section: 7A

Date: March, 1991


Subject:
PRODUCT CAMPAIGN 90C34 TRANSAXLE INTERMEDIATE SERVO COVER PISTON BORE


Model and Year:
1990 CHEVROLET CAVALIER, BERETTA AND CORSICA WITH 2.2L ENGINE (VIN CODE G) AND 3T40 TRANSAXLE (RPO MD9)


* NOTE: THIS TSB HAS BEEN CORRECTED BY SUPPLEMENT 90C34(A)7A.

TO: ALL CHEVROLET DEALERS

General Motors has determined that certain 1990 Chevrolet Cavalier, Beretta and Corsica model vehicles equipped with 2.2L engines and 3T40 transaxles may have been assembled with a transaxle intermediate servo cover with a rough piston bore. The rough finish could eventually wear the lip of the (inner) intermediate servo seal, causing a leak in the second clutch circuit (intermediate servo apply). This leak may cause intermediate band and direct clutch wear, and result in a "no second gear" condition.

To prevent this condition from occurring, dealers are to inspect the transaxle I.D. plate on involved vehicles for Julian Dates, and if necessary, install an intermediate servo cover kit or replace the transaxle as instructed in the SERVICE PROCEDURE section of this bulletin.

VEHICLES INVOLVED

Involved are certain 1990 Chevrolet Cavalier, Beretta and Corsica model vehicles equipped with 2.2L engines and 3T40 transaxles built within the following VIN breakpoints:

PLANT
YEAR MODEL PLANT CODE FROM THROUGH

1990 J-Car Janesville "J" LJ305686 LJ313136

1990 L-Car Wilmington "Y" LY259395 LY266181

While all involved vehicles will require inspection of the transaxle I.D. plate for Julian Dates, it is expected that only about 11% of inspected vehicles will require installation of the Intermediate Servo Cover Kit. Very few, if any, vehicles should require a SRTA (Service Replacement Transaxle Assembly) Transaxle.


Involved vehicles have been identified by Vehicle Identification Number Computer Listings. Computer listings contain the complete Vehicle Identification Number, owner name and address data, and are furnished to involved dealers with the campaign bulletin. Owner name and address data furnished will enable dealers to follow-up with owners involved in this campaign.

These listings may contain owner names and addresses obtained from State Motor Vehicle Registration Records. The use of such motor vehicle registration data for any other purpose is a violation of law in several states. Accordingly, you are urged to limit the use of this listing to the follow-up necessary to complete this campaign. Any dealer not receiving a computer listing with the campaign bulletin has no involved vehicles currently assigned.