For 1990-2009 cars

# TRANSAXLE BRG. WHINE AUDIBLE IN 1ST,2ND, & 3RD GEAR

********************************************************************** 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.

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.

COPYRIGHT 1993. GM POWERTRAIN DIVISION. GENERAL MOTORS CORPORATION. ALL RIGHTS RESERVED.