Campaign - A/T Intermediate Servo Cover Piston Bore

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Number: SUPPLEMENT 90C34(a)

Section: 7A

Date: March, 1991


Subject:
PRODUCT CAMPAIGN 90C34(a) 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)


TO: ALL CHEVROLET DEALERS

This supplement corrects the engine specifications found in the "Model and Year" description, opening paragraph and Vehicles Involved section of Chevrolet Product Campaign Bulletin 90C34, dated March, 1991. Specifically, the engine and engine VIN code were incorrectly specified in the original bulletin. The correct specification should have been a 2.2L engine with a VIN code "G". Owner notification letters were corrected prior to mailing. Revised information is shown in bold type and denoted with a # sign.

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.

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