OIL WEIR TRIAL RUN 125 TRANSMISSION

TO: ALL CHEVROLET DEALERS

Beginning September 11, 1981, THM 125 and 125C transmissions will be assembled with a new part called an oil weir. This part will be used for one (1) month as a P.T.R. (production trial run).

The oil weir is located in the rear case - oil pan area and will revise the lubrication flow around the differential assembly. See Figure 1.

The oil weir, P/N 8637836, is held in place by a retaining clip, P/N 8637837, and both parts are available for service. Transmissions built without an oil weir do not require its addition during service.

WDDGM will notify dealers through sales information bulletin when parts are available.

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.