INPUT HOUSING AND SHAFT ASSY. NEW ASSEMBLY AVAILABLE

Beginning January 11, 1984, (Julian Date 011), all THM 700-R4 transmissions were built with a new input housing and shaft assembly.

The past input housing and shaft assembly had a check ball seat drilled into the housing. A check ball was installed into this hole and the opening was staked to retain the check ball (see Figure 1).

The new input housing and shaft assembly has a check valve retainer and ball assembly which is pressed into the housing (see Figure 2).

Service Information:

1. Only the new input housing and shaft assembly is available for service. The check valve retainer and assembly will be available at a later date. Refer to the parts manual for correct part numbers and more applications.

2. The check valve retainer and ball assembly must not be installed in the past input housing and shaft assembly. Damage to the piston or housing lip seal surface could result.

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.