DRIVELINE STOP CLUNK SPECIAL LUBRICANT
SUBJECT: DRIVELINE STOP CLUNK (SPECIAL LUBRICANT)
MODELS AFFECTED: 1991-92 ROADMASTER SEDANS AND WAGONS
Normal driveline tension build-up is released following vehicle braking on some 1991-92 Roadmasters as driveline clunk when stopping. The tension build-up is the result of the driveshaft splines binding on the transmission slip yoke.
To eliminate stop clunk due to spline-yoke bind, the driveshaft splines should be lubricated with a special lubricant. This bulletin releases a new lubricant that has increased durability over the previously released lubricant.
NOTICE: This procedure should be applied to 1991-92 Roadmasters only. When applied to other vehicles, possible transmission lube contamination could result.
SERVICE PROCEDURE:
1. Remove driveshaft.
2. Clean slip yoke and inside of driveshaft spline with solvent and clean cloth.
3. Apply grease (P/N 12345879) to slip yoke spline with a brush or swab, so as to completely cover the entire spline with a light coating of grease.
4. Reinstall driveshaft.
SERVICE PARTS INFORMATION:
Part Number Description ----------- ----------- 12345879 1 lb. can of special lubricant (should service about 50 vehicles)
Parts are currently available from GMSPO.
WARRANTY INFORMATION
For vehicles repaired under warranty use:
Labor Operation No.: T7995 Labor Time: .4 hr
General Motors bulletins are intended for use by professional technicians, not a "do-it-yourselfer". They are written to inform those technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions and know-how to do a job properly and safely. If a condition is described, do not assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See a General Motors dealer servicing your brand of General Motors vehicle for information on whether your vehicle may benefit from the information.
