Seville V8-273 4.5L (1989)
Fluid Pan: Customer Interest
A/T - Oil Pan Leak
Bulletin No.
T-90-74
File in Group
7
Number
219
Corp. Ref. No.
077120R
Date
May, 1990
SUBJECT:
TRANSAXLE BOTTOM PAN LEAK AT BLIND BOLT HOLES - HYDRA-MATIC 4T60 AND THM F-7
MODELS AFFECTED:
1985-1990 DE VILLES AND FLEETWOODS 1986-1990 ELDORADOS AND SEVILLES 1987-1990
ALLANTES
Whenever the bottom pan has been removed on any Hydra-Matic 4T60 (THM 440-T4) or THM F-7 transaxle, it may be necessary to use Loctite 242(R)
(or equivalent) to reduce the potential for fluid leaks on any blind (not through) bolt holes for bottom pan bolts.
Service Procedure:
If the transaxle has a leak from a bottom pan bolt(s), clean the bolt(s) and bolt hole(s) in the transaxle case with a suitable solvent to ensure that it is free
of dirt and transmission fluid. Apply Loctite 242(R) (or equivalent) to the bolt per the sealant manufacturer's instructions, and allow the compound to
cure according to the sealant manufacturer's recommendations.
IMPORTANT:
The fluid leak could also be caused by a cut or damaged 1-2 servo seal or other damaged seals or gaskets in the leak area. If
necessary, use one of the fluid leak methods like the powder or the black light and dye methods listed in Section 7A of the
Service Information Manual. Correct the leak as necessary.
Service Parts Information:
P/N
Description
12345382
Loctite 242(R) (or equivalent)
Parts are currently available from GMSPO.
NOTICE:
Loctite 242(R) is a removal threadlocker. Do not use stronger threadlockers like Loctite
290(R) or the Loctite threadlocking kit(R). The aluminum threads may come out with the bolt the next time the bolt is taken out.
