M/T - Neutral Gear Rattle

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Number: 92-109-7B

Section: 7B

Date: FEB. 1992

Corporate Bulletin No.: 237201


ASE No.: A3


Subject:
TRANSAXLE NEUTRAL GEAR RATTLE


Model and Year:
1991-92 LUMINA WITH 5-SPEED MANUAL TRANSMISSION


Some owners of 1991-92 W cars may comment about a "rattle" noise when the Getrag 284 5-speed transaxle (M27) is in neutral with the clutch engaged and engine is at idle.

Various levels of minor gear "rattle" or noise are inherent in all manual transaxles. Customer may perceive gear "rattle" as clutch, engine, and/or transmission noise. The "rattle" noise is normal and will not affect the function or durability of the vehicle.

Inherently, a clutch disc that is designed to dampen neutral gear rattle may increase clunk between shifts or during throttle tip-in and tip-out.

Before replacing any components, test drive the vehicle to evaluate the severity of the neutral gear rattle and clunk (minor level of both these conditions is normal).

If the clunk is not objectionable, a different clutch disc is available to address the neutral gear rattle concern.

Note: Replace clutch components per Service Manual. Be sure to follow the proper clutch cover bolts tightening sequence as stated in the manual.

For neutral gear rattle

Part Name Part No.

Disc 10111523

Parts are currently available through GMSPO.

Labor Operation Number: K0800

Use applicable labor time guide for labor hours.