TRANSAXLE BRG. WHINE AUDIBLE IN 1ST,2ND, & 3RD GEAR. Buick Century 1991

********************************************************************** TRANSAXLE APPLICATIONS: SUBJECT: HYDRA-MATIC 4T60 (RP0 ME9) TRANSAXLE BEARING WHINE AUDIBLE HYDRA-MATIC 4T60-E (RP0 M13) IN 1ST, 2ND, AND 3RD GEAR (REPLACE BEARING ASSEMBLY)

TRANSAXLE MODELS: VEHICLE APPLICATIONS: ALL A, C, E, H, K, W-CAR U-VAN **********************************************************************

CONDITION:

SOME VEHICLES EQUIPPED WITH A HYDRA-MATIC 4T60 (RP0 ME9) OR 4T60-E (RP0 M13) TRANSAXLE BUILT ON OR BEFORE JUNE 23, 1993 (JULIAN DATE 174), MAY EXHIBIT A TRANSAXLE BEARING WHINE THAT IS AUDIBLE IN 1ST, 2ND, AND 3RD GEAR. THE WHINE IS MOST AUDIBLE ON THE "DRIVER'S" SIDE OF THE VEHICLE WHILE IN 2ND GEAR DURING A LIGHT THROTTLE ACCELERATION.

IMPORTANT: THIS BEARING WHINE CANNOT BE HEARD IN "PARK" OR "NEUTRAL."

CAUSE: (FIGURE 1)

THE BEARING ASSEMBLY, 4TH CHANNEL PLATE HUB/CHANNEL PLATE" (503/ 431) MAY HAVE BEEN IMPROPERLY INSTALLED CAUSING THE NEEDLE BEARINGS TO LEAVE INDENTATION MARKS ON THE BEARING RACE.

CORRECTION:

REPLACE THE "BEARING ASSEMBLY, 4TH CHANNEL PLATE HUB/CHANNEL PLATE" (503/431) LOCATED ON THE "CHANNEL PLATE ASSEMBLY" (404/401).

PART INFORMATION:

PART NUMBER FOR THE "BEARING ASSEMBLY, 4TH CHANNEL PLATE HUB/ CHANNEL PLATE" IS THE SAME FOR THE 4T60 AND 4T60-E TRANSAXLE.

PART NUMBER DESCRIPTION

8656393 BEARING ASSEMBLY, 4TH CHANNEL PLATE HUB/CHANNEL PLATE

PARTS ARE CURRENTLY AVAILABLE FROM GMSPO.

Object Number: 79914 Size: FS

GENERAL MOTORS BULLETINS ARE INTENDED FOR USE BY PROFESSIONAL TECHNICIANS, NOT A "DO-IT-YOURSELFER." THEY ARE WRITTEN TO INFORM THOSE TECHNICIANS OF CONDITIONS OCCURRING 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 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.