Lumina L4-151 2.5L (1991)
Seals and Gaskets: Customer Interest
A/T - Fluid Leak at The Converter Seal
Number: 93-53B-7A
Section: 7A
Date: AUGUST 1993
Corporate Bulletin No.: 277148R
ASE No.: A2
Subject:
TRANSAXLE FLUID LEAK AT HELIX CONVERTER SEAL
Model and Year:
1991-93 LUMINA, LUMINA APV
THIS BULLETIN CANCELS AND SUPERSEDES DEALER SERVICE BULLETIN 93-53-7A AND 93-53A-7A DATED NOV. 1992 AND JULY
1993. THE CORRECTION HAS BEEN CHANGED AND THE ART WORK HAS BEEN DELETED. ALL COPIES OF 93-53-7A AND 93-53A-7A
SHOULD BE DISCARDED.
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.
