HARSH PARK/ NEUTRAL TO DRIVE ENGAGEMENT

MODELS AFFECTED: ALL 1982-1984 THM 125C TRANSAXLES

A 1982-1984 THM 125C transaxle may exhibit a harsh Park/Neutral to Drive engagement. Refer to Figure 1 for transaxle identification information.

At the start of production (SOP) 1985, all THM 125C transaxles were built with a new forward clutch assembly. This change eliminated the check ball in the forward clutch housing (Figure 2, Item 624--arrow indicates check ball location) and provided bleed orifices in the forward clutch piston assembly (Figure 2, Item 629).

The new forward clutch housing (Part Number 8653977) is used to service all 1982-1984 THM 125C models. The new forward clutch piston and seal package (Part Number 8637973) must be installed when replacing a forward clutch housing.

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.