SOFT 1-2 SHIFT THM 700-R4 NEW ACCUMULATOR SPRING

MODELS: 1983 LIGHT DUTY TRUCKS EQUIPPED WITH THM 700-R4 TRANSMISSIONS

Some 1983 vehicles equipped with THM 700-R4 transmissions and 6.2L diesel engines may exhibit a soft 1-2 upshift feel. If a "firmed up" 1-2 shift is desired, it can be accomplished by the following:

Remove and discard existing 1-2 accumulator spring.

Install replacement 1-2 accumulator spring, part number 8634163.

This applies to any 3VJ, 3TB, 3MH or 3TP model transmissions built prior to breakpoint serial number 314D.

Refer to proper service manual section.

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.