NEUTRAL TO REVERSE SHIFT FEEL NEW PARTS - 700 TRANSMISSION

Beginning in July, 1982, transmission Build Date 184, all 700-R4 transmissions were built with the following revised parts:

- Spacer plate/valve body gasket - Spacer plate/case gasket - Spacer plate - Oil pump cover assembly - Waved reverse input clutch plate

Use of these parts will provide a more desirable neutral to reverse garage shift feel.

SERVICE INFORMATION

1. The following chart contains the correct part numbers to service transmissions built both before and after this change:

PART NAME PAST DESIGN NEW DESIGN

Part No. I.D. Part No. I.D. Spacer Plate/valve body gasket 8642920 None Spacer plate/case gasket 8642920 None 8642952 Spacer plate 8642655 A 8647066 B Oil pump cover asm. 8647042 8647189 *Oil pump cover asm. 8647043 8647190 Waved reverse input cl. plate 8642060 8647067

*Use for TN,TP,M6,& MH models all other models use 8647042

2. Any transmission, built prior to breakpoint serial no.184, which has an objectionable neutral to reverse garage shift feel can be updated by installing all the new design parts shown in the above chart.

3. When installing a new spacer plate or oil pump cover assembly on any THM 700-R4 transmission built prior to serial no. 184, be certain to:

a. Check the spacer plate identification.

b. If the spacer plate is identified by an A, use the past design parts.

c. If the spacer plate is identified by a B, use the new design parts.

4. If the transmission was built after serial no. 184, use the new design parts.

5. The new design and past design parts are non-interc angeable except:

a. The new design waved reverse input clutch plate and the new design spacer plate gaskets can be used in place of the past design parts if necessary.

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.