Cutlass Ciera FWD V6-260 4.3L DSL (1982)
Fluid Pan: All Technical Service Bulletins
A/T Oil Pan Valve Body Cover - Leaks
SUBJECT
NEW GASKETS FOR TRANSAXLE OIL
NUMBER: 86-T-18
PAN AND/OR VALVE BODY COVER LEAKS
DATE:
Feb.. 14, 1986
MODELS/YEARS
1980 THROUGH 1986 THM 125/125C
TRANSAXLE
SECTION: 7A
Beginning June 6, 1985, (Julian Date 157) all 1985 THM 125 and 125C transaxles are being produced using new gaskets for the oil pan and valve body
cover. The new gaskets improve sealing capability by better withstanding fastener torques.
When servicing 1980 through 1984 THM 125 and 125C transaxles built prior to September 1983 (1984 model year, Julian Date 244), refer to November
1983 Service Guild which describes the use of a new oil pan and valve body cover incorporating a raised rib on the flange. Make sure that the service
parts packages called for in the November 1983 Service Guild (part nos. 8653942 and 8653943) contain the new latex-coated cellulose (hard, fiber
material) gasket. Some service parts packages may contain the latex-coated cork (soft material) gasket, which should not be used.
When servicing 1984 through 1986 THM 125 and 125C transaxles built after September, 1983 for oil pan and/or valve body cover fluid leaks, refer to
the following procedure:
SERVICE PROCEDURE
1.
Diagnose source of fluid leak to be certain leak is from the transaxle oil pan and/or valve body cover (refer to the correct service manual section).
2.
If leak is determined to be from the transaxle oil pan and/or valve body cover area:
A.
Remove the oil pan and/or valve body cover.
B.
Clean the case, oil pan and/or valve body cover faces (with solvent) and visually inspect for damage and/or presence of gasket material.
C.
Make sure all gasket material is removed from the case, oil pan and/or valve body cover faces.
3.
Replace the transaxle oil pan and/or valve body cover gasket(s) with:
Package No.
Quantity
Description
8660038
1
Transaxle Oil Pan Gasket
8660039
1
Transaxle Valve Body Cover Gasket
4.
When replacing the oil pan and/or valve body cover, it is critical that a torque wrench is used to tighten the hex head screws. Hand torque all hex
head screws 12-16 N-m (9-12 ft.lbs.).