Celebrity V6-173 2.8L (1989)
Clutch: All Technical Service Bulletins
A/T - Smooth Direct Clutch Fiber Plates
Number:
90-03-7A
Section:
7A
Date:
APRIL, 1989
Subject: SMOOTH DIRECT CLUTCH FIBER PLATES FOR THM-125C TRANSMISSIONS
Model and Year:
1989-90 A, J, L, W CARS WITH THM-125C (3T40) TRANSMISSIONS
TO:
ALL CHEVROLET DEALERS
This bulletin covers information on New Smooth surface Fiber Plates that are used in the Direct Clutch Assemblies. These new plates have a smooth
surface as compared to the previous grooved plates.
The new plates went into production as an option to grooved plates February 27, 1989, (Julian Date 058) for THM 125/125C/HYDRA-MATIC 3T40
transaxles. Therefore, some transaxles built after February 27, 1989, may contain grooved plates.
When service to any THM 125C/HYDRA-MATIC 3T40 built after February 27, 1989 (Julian Date 058) is necessary, smooth plates must be used in the
Direct Clutch Assembly due to specific calibrations. Do not install grooved plates in the Direct Clutch Assembly. If service to the Forward Clutch is
necessary, grooved or smooth plates may be used.
Refer to the following part numbers when ordering fiber plates for the Direct and/or Forward Clutch Assemblies:
Package Description
Part No.
Overhaul, Package
8665949 This package can be used
in all models built since S.O.P. 1986.
Fiber Plates (only) Direct
8643741
or Forward Clutch
When it is necessary to order overhaul Packages for fiber plates, be sure to order by the year the transaxle was built.
Parts are expected to be available on 4/24/89. Until then normal part orders will not be accepted by GMSPO. Only verifiable emergency VIP orders will
be accepted. SPO will make every effort to obtain parts. All parts will be placed on 400 control to waive VIP surcharges. However, the part will be
shipped premium transportation at dealer's expense. All other order types will be cancelled as incorrectly ordered while the 400 control is in place.
When service to the Direct/Forward Clutch is necessary, refer to the THM 125C/HYDRA-MATIC 3T40 Unit Repair Section of your Service Manual.