GM Service Manual Online
For 1990-2009 cars only

NEW FORWARD AND DIRECT CLUTCH THM 125C TRANSAXLE

ALL 1985 THM 125C

At the start of production for 1985 all THM 125C transaxles are being built with a new forward and direct clutch assembly (see Figures 1 & 2).

The 1985 production forward and direct clutch assemblies are not interchangeable with the 1984 or prior model year forward and direct clutch assemblies. See Figures 1 & 2 for identification.

For 1984 and past model service new forward and direct clutch housing service assemblies are now available (see Figures 4 & 5). The direct clutch housing service package, Part Number 8653978, will contain the following:

Direct clutch housing assembly Direct clutch piston assembly Direct clutch piston inner, outer and center seals Intermediate band assembly

The forward clutch housing service package, Part Number 8653977, will contain the following:

Forward clutch housing assembly

NOTICE: Do not use any component parts from the 1985 production forward clutch assembly or direct clutch assembly to service prior model year clutch assemblies. This includes the 1985 production composition clutch plates for both the forward and direct clutch. Refer to Figures 1 thru 6 for component identification and refer to the appropriate service parts book.


Object Number: 84772  Size: FS


Object Number: 86969  Size: MF


Object Number: 87779  Size: MF


Object Number: 89274  Size: MF


Object Number: 86968  Size: MF


Object Number: 87539  Size: MF

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.