Fiero L4-151 2.5L (1985)
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.).
Technical Service Bulletin # 8675
Date: 851101
Oil Pan Gasket and Valve Body Cover Gasket - Revised
Number
86-7-5
Date
11/85
Subject:
NEW TRANSAXLE OIL PAN GASKET AND VALVE BODY COVER GASKET
FOR 1985 AND EARLIER PHOENIX, SUNBIRD, 6000, GRAND AM AND FIERO VEHICLES EQUIPPED WITH 125-C TRANSMISSIONS
Revised by TSB # 8672, Dated 10/85.
Beginning June 6, 1985, or Julian Date 157, all models of the THM 125C transaxle are being produced using new gaskets for the oil pan and valve body
cover. The new gaskets have been improved to better withstand specified torque applications and reduce potential transaxle fluid leaks.
Hydra-matic Division requests and authorizes that all dealer inventory of the following packages be returned to WDDGM for credit.
Package No.
Description
8631338
Transaxle Oil Pan Gasket
8631340
Transaxle Valve Body Cover Gasket
For THM 125C transaxles built prior to September, 1983 (1984 model year, Julian Date 344), refer to Product Service Bulletin 83-I-149A for proper
service procedures. THM 125C transaxles built after September, 1983 used a new oil pan and valve body cover. When servicing these transaxles for oil
pan and/or valve body cover 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 RTV (Room
Temperature Vulcanizing) sealant.
C.
Make sure all RTV sealant is removed from the case, oil pan and/or valve body cover faces.
3.
Replace the past 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.).
