M/T - Service Manual Update, Fluid Usage
88chevy27Number: 89-18-7B
Section: 7B
Date: OCT., 1988
Subject: MANUAL TRANSMISSION FLUID USAGE
Model and Year: 1989 CORVETTE WITH 6-SPEED MANUAL TRANSMISSION
TO: ALL CHEVROLET DEALERS
The 1989 Corvette Service Manual (Section OB-7) and the 1989 GM Maintenance Schedule for passenger cars indicate an incorrect transmission fluid part number for the 1989 Corvette equipped with a 6-speed manual transmission.
The correct transmission fluid should be (P/N 1052931) Manual Transmission Fluid or equivalent, as indicated in the 1989 Corvette Owners Manual and Service Manual, Section 7B-2.
Use of the incorrect fluid may cause shiftability concerns and/or damage to the transmission.