Campaign - M/T Requires Replacement: Overview
89Oldsmobile10Subject: Manual Transaxle High Carbide Gears
Models/Years: Certain 1989 Cutlass Calais Models
With 5-speed Manual Transaxle (RPO MG2)
Number: 89-C-08
Date: September 1989
Section: 7A & 7B3
CONDITION
General Motors has determined that certain 1989 Oldsmobile Cutlass Calais models were produced with 5-speed manual transaxles which may have gears with a high carbon content in the tooth surfaces. These gears could, as mileage accummulates, damage the softer gears to which they mate. The first effect noticeable to a driver would be gear noise resulting from spalling (pitting) of gear surfaces. If the transaxle is left unserviced, internal damage may occur, leading to vibration or the shifter "popping out of gear", and finally to a loss of drive in one or more gears.
Up to ten different gears in each of the involved transaxles may have excess carbide, hence the involved transaxles are to be replaced with a new assembly to prevent the above condition from recurring on the same vehicles as mileage accummulates.