For 1990-2009 cars

# TRANSAXLE FLUID LEAK AT CON. (INSTALL NEW HELIX CON. SEAL)

THIS BULLETIN IS BEING REVISED TO CHANGE THE CORRECTION.

********************************************************************* TRANSAXLE APPLICATIONS: SUBJECT: 1991-93 HYDRA-MATIC 4T60-E (RPO M13) TRANSAXLE FLUID LEAK AT HELIX CONVERTER SEAL (REPLACE TRANSAXLE WITH SRTA UNIT)

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

#### CONDITION:

SOME VEHICLES EQUIPPED WITH A 1991-93 HYDRA-MATIC 4T60-E (RPO M13) TRANSAXLE BUILT ON OR BEFORE JULIAN DATE 302 (OCTOBER 28, 1992) MAY EXHIBIT A FLUID LEAK BETWEEN THE HELIX CONVERTER SEAL AND ITS BORE. UNDER SOME CONDITIONS THE HELIX CONVERTER SEAL MAY WALK-OUT PARTIALLY OR COMPLETELY. HOT WEATHER AND/OR EXTREME OPERATING CONDITIONS ARE CONTRIBUTING FACTORS TO THIS CONCERN.

#### CAUSE:

THE ABOVE CONDITION MAY BE DUE TO THE TAPER OF THE HELIX CONVERTER SEAL BORE AND CANNOT BE REPAIRED AT A DEALERSHIP LEVEL.

#### CORRECTION:

BEGIN WITH THE "FLUID LEAK DIAGNOSIS" ("AUTOMATIC TRANSAXLE ON-VEHICLE SERVICE SECTION OF THE 1991-93 SERVICE MANUAL") WHICH PROVIDES A DETAILED PROCEDURE IN LOCATING AND REPAIRING VEHICLE LEAKS.

IF IT IS DETERMINED THE LEAK IS FROM THE HELIX CONVERTER SEAL, REMOVE THE TRANSAXLE ASSEMBLY AND REPLACE IT WITH A SERVICE REPLACEMENT TRANSMISSION ASSEMBLY (SRTA).

SERVICE MANUAL INFORMATION:

REFER TO THE 1991-93 SERVICE MANUAL, AUTOMATIC TRANSAXLE ON-VEHICLE SERVICE SECTION 7A FOR PROPER ON-VEHICLE SERVICE TO REMOVE AND REPLACE A HYDRA-MATIC 4T60-E TRANSAXLE.

LABOR TIME INFORMATION:

LABOR TIME SHOULD BE CHARGED UNDER OPERATION NUMBER K7000 FOR "TRANSAXLE ASSEMBLY-REPLACE" FROM THE APPROPRIATE 1991-1993 LABOR TIME GUIDE.

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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.