CLICKING 'SHOE SLAP' R. BRAKES (REPLACE BRAKE DRUMS). Buick Roadmaster 1992

CONDITION:

SOME OWNERS OF 1992 B-CAR SEDANS WITH JA2 BRAKES MAY COMMENT ON A "CLICKING" TYPE NOISE COMING FROM THE REAR BRAKES DURING APPLY.

CAUSE:

IMPROPER MACHINING CREATES A "THREAD LIKE" PATTERN ON THE DRUM BRAKING SURFACE WHICH CAUSES THE BRAKE SHOES TO MOVE OUT IN THE DRUM AND THEN "CLICK OR SLAP" BACK ON THE BACKING PLATE.

CORRECTION:

AS OF THE FOLLOWING VIN BREAKPOINTS, A NEW BRAKE DRUM WAS RELEASED FOR PRODUCTION ON ALL SEDANS WITH JA2 BRAKES. THIS DRUM HAS A REVISED SURFACE FINISH TO REDUCE "SHOE SLAP" ON DRUM BRAKES. IF A VEHICLE IS FOUND WITH THIS CONDITION, REPLACE BOTH BRAKE DRUMS WITH THE NEW P/N 1244646.

ARLINGTON:

CHEVROLET CAPRICE - 1G1BN53E3NR133409 BUICK ROADMASTER - 1G4BN537XNR460328

WILLOW RUN:

CHEVROLET - 1G1BN53E2NW136468

PART AVAILABILITY:

PARTS ARE CURRENTLY AVAILABLE FROM GMSPO.

WARRANTY INFORMATION:

LABOR OPERATION: H-0207 LABOR TIME: 0.5 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.