RIGHT AXLE OIL SEAL LEAKS (INSTALL REVISED SEAL). Buick Riviera 1993

SUBJECT: RIGHT AXLE OIL SEAL LEAKS (INSTALL REVISED RIGHT AXLE OIL SEAL)

MODELS: 1992-1993 BUICK RIVIERA 1992-1994 BUICK CENTURY, PARK AVENUE, LE SABRE, SKYLARK AND REGAL 1992 CADILLAC ALLANTE 1992-1993 CADILLAC FLEETWOOD (FWD), SIXTY SPECIAL, ELDORADO AND SEVILLE 1992-1994 CADILLAC DE VILLE 1992-1994 CHEVROLET CAVALIER, BERETTA, CORSICA, LUMINA AND LUMINA APV 1992 OLDSMOBILE TORONADO 1992-1994 OLDSMOBILE CUTLASS CIERA, NINETY EIGHT, EIGHTY EIGHT, ACHIEVA, CUTLASS SUPREME AND SILHOUETTE 1992-1994 PONTIAC SUNBIRD, BONNEVILLE, GRAND AM, GRAND PRIX AND TRANS SPORT

TRANSAXLE APPLICATIONS: HYDRA-MATIC 3T40 (RPO MD9) HYDRA-MATIC 4T60 (RPO ME9) HYDRA-MATIC 4T60-E (RPO M13)

TRANSAXLE MODELS: 1992-1994 MODELS BUILT BEFORE JUNE 6, 1994 (JULIAN DATE 157)

CONDITION:

SOME OWNERS MAY EXPERIENCE AN OIL LEAK THAT IS DIAGNOSED AS A RIGHT AXLE OIL SEAL LEAK AT THE AXLE TRIPOT SHANK.

CAUSE:

THIS CONDITION MAY BE CAUSED BY INADEQUATE SEAL CONTACT TO THE AXLE TRIPOT SHANK.

CORRECTION:

A REVISED RIGHT AXLE OIL SEAL WAS IMPLEMENTED IN PRODUCTION TO REDUCE THE POTENTIAL FOR AXLE OIL SEAL LEAKS AND IS AVAILABLE FOR SERVICE. THE REVISED RIGHT AXLE OIL SEAL EXTENDS OVER THE AXLE TRIPOT SHANK AN ADDITIONAL 2 MM (REFER TO FIGURE 1).

SERVICE INFORMATION:

WHEN RIGHT AXLE OIL SEAL REPLACEMENT IS REQUIRED ON ANY 1992-1994 HYDRA-MATIC 3T40, 4T60 OR 4T60-E TRANSAXLE, INSTALL THE REVISED RIGHT AXLE OIL SEAL LISTED UNDER "SERVICE PARTS INFORMATION". THE PREVIOUS RIGHT AXLE OIL SEAL WAS BLUE IN COLOR. THE REVISED RIGHT AXLE OIL SEAL IS GREEN.

IMPORTANT: WHEN A DRIVE AXLE IS REMOVED FROM THE TRANSAXLE FOR ANY REASON, THE AXLE SEALING SURFACE (TRIPOT SHANK) SHOULD BE INSPECTED FOR CORROSION. IF CORROSION IS EVIDENT, THE SURFACE SHOULD BE CLEANED WITH 320 GRIT CLOTH OR EQUIVALENT. AUTOMATIC TRANSMISSION FLUID MAY BE USED TO CLEAN OFF ANY REMAINING DEBRIS. THE SURFACE SHOULD BE WIPED DRY AND THE DRIVE AXLE REINSTALLED FREE OF ANY BUILD UP.

SERVICE PARTS INFORMATION:

THE FOLLOWING TABLE LISTS LEFT AND RIGHT AXLE OIL SEAL USAGE FOR ALL HYDRA-MATIC 3T40, 4T60 AND 4T60-E TRANSAXLES:

+-------------------------------------------------------------------+ | PREVIOUS | NEW | | MODEL YEARS/ | | PART NUMBER | PART NUMBER | DESCRIPTION | APPLICATIONS | |-------------+-------------+--------------------+------------------| | 8666007 | * | SEAL ASM, AXLE OIL | 1980-1991 3T40 | | | | (RIGHT SIDE) | 1985-1991 4T60 | | | | | 1991 4T60-E | |-------------+-------------+--------------------+------------------| | 8666007 | ** | SEAL ASM, AXLE OIL | 1980-1994 3T40 | | | | (LEFT SIDE) | | |-------------+-------------+--------------------+------------------| | 8679744 | ** | SEAL ASM, AXLE OIL | 1985-1994 4T60 | | | | (LEFT SIDE) | 1991-1994 4T60-E | |-------------+-------------+--------------------+------------------| | | | | 1992-1994 3T40 | | 8666007 | 24202835 | SEAL ASM, AXLE OIL | 1992-1993 4T60 | | | | (RIGHT SIDE) | 1992-1994 4T60-E | +-------------------------------------------------------------------+

* THE RIGHT AXLE OIL SEAL HAS NOT BEEN REVISED FOR 1980-1991 TRANSAXLES.

** THE LEFT AXLE OIL SEAL HAS NOT BEEN REVISED.

PARTS ARE EXPECTED TO BE AVAILABLE ON SEPTEMBER 5, 1994.

WARRANTY INFORMATION:

FOR VEHICLES REPAIRED UNDER WARRANTY, USE: +------------------------------------------------------------+ | LABOR | | | OPERATION | DESCRIPTION | |-----------+------------------------------------------------| | K6900 | SEAL, RIGHT TRANSAXLE AXLE SHAFT OIL - REPLACE | |-----------+------------------------------------------------| | K6901 | SEAL, LEFT TRANSAXLE AXLE SHAFT OIL - REPLACE | |-----------+------------------------------------------------| | K6907 | SEAL, BOTH TRANSAXLE AXLE SHAFT OIL - REPLACE | +------------------------------------------------------------+ USE PUBLISHED LABOR OPERATION TIME.

FIGURES: 1 ATTACHMENTS: 0

Object Number: 84043 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.