LO-REV CLUTCH RATTLE/CLICKING IN 3RD GEAR-NEW FIBER PLATES

Model and Year: 1989 A, J, L CARS WITH THM 125C/HYDRA-MATIC 3T40 TRANSAXLES

BULLETIN COVERS:

An intermittent rattle and/or clicking noise caused by Lo-Reverse parallel grooved fiber plates in 1989 THM 125C/HYDRA-MATIC 3T40 transaxles. This noise is most evident in the 3rd gear range.

DATE OF PRODUCTION CHANGE: (Figures 1 and 2)

New smooth surface fiber plates for the Lo-Reverse clutch went into production May 5, 1989, (Julian Date 125), for Willow Run built HYDRA-MATIC 3T40 transaxles and May 15, 1989, (Julian Date 135) for Windsor built HYDRA-MATIC 3T40 transaxles.

SERVICE ACTION:

If a customer comments about a rattle and/or clicking noise condition in any THM 125C/ HYDRA-MATIC 3T40 transaxle, the Lo-Reverse fiber plates should be replaced with new smooth surface fiber plates.

SERVICE PARTS INFORMATION:

When ordering new Lo-Reverse fiber plates for this condition refer to the following part numbers:

Part Number Package Description ----------- -------------------- 8665960 Overhaul Kit 8666667 Lo-Rev Clutch Pack

Parts are expected to be available on 9/1/89. 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 canceled as incorrectly ordered while the 400 control is in place.

SERVICE MANUAL REFERENCE:

Whenever servicing any THM 125C/HYDRA-MATIC 3T40 transaxle refer to the procedures outlined in the Unit Repair Section of your Service Manual.

General Motors bulletins are intended for use by professional technicians, not a "do-it-yourselfer". They are written to inform those technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions and know-how to do a job properly and safely. If a condition is described, do not assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See a General Motors dealer servicing your brand of General Motors vehicle for information on whether your vehicle may benefit from the information.