Axle Oil Seal, Right - Leaks at the Axle Tripod Shank
Group Ref.: 7 - TransmissionBulletin No.: 477133
Date: August, 1994
SUBJECT:
RIGHT AXLE OIL SEAL LEAKS
(INSTALL REVISED RIGHT AXLE OIL SEAL)
MODELS:
1992-93 BUICK RIVIERA
1992-94 BUICK CENTURY, PARK AVENUE, LE SABRE, SKYLARK AND REGAL
1992 CADILLAC ALLANTE
1992-93 CADILLAC FLEETWOOD (FWD), SIXTY SPECIAL, ELDORADO AND SEVILLE
1992-94 CADILLAC DE VILLE
1992-94 CHEVROLET CAVALIER, BERETTA, CORSICA, LUMINA AND LUMINA APV
1992 OLDSMOBILE TORONADO
1992-94 OLDSMOBILE CUTLASS CIERA, NINETY EIGHT, EIGHTY EIGHT, ACHIEVA, CUTLASS SUPREME AND SILHOUETTE
1992-94 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:
1992-94 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 table lists Left and Right Axle Oil Seal usage for all Hydra-matic 3T40, 4T60 and 4T60-E transaxles:
PARTS INFORMATION:
Parts are expected to be available on September 5, 1994.
WARRANTY INFORMATION:
For vehicles repaired under warranty, use: