NEW FORWARD SPRAG CLUTCH THM 700-R4 TRANSMISSION

Beginning May 3, 1982, a new forward sprag clutch entered production replacing the forward roller clutch on all 700-R4 transmissions.

The forward sprag clutch will be serviced as a kit for all transmissions built prior to May, 1982. The conversion kit, P/N 8642947, will consist of:

a. Snap ring - overrun clutch hub b. Overrun clutch hub c. Wear plate d. Forward sprag clutch assembly e. Retainer and race assembly f. Forward sprag outer race g. Input sun gear assembly h. Input carrier assembly i. Thrust washer j. Instruction sheet

The following individual part numbers can be used to service all transmissions which have a forward sprag clutch or have been converted.

8647083 - Snap ring - overrun clutch hub 8647082 - Overrun clutch hub 8647081 - Wear plate 8647084 - Forward sprag clutch assembly 8647085 - Retainer and race assembly 8647090 - Forward sprag outer race 8647093 - Input sun gear assembly 8647050 - Input carrier assembly 8647095 - Thrust washer

1 Input Housing & Shaft Assembly 2 Snap Ring - overrun Clutch Hub 3 Overrun Clutch Hub 4 Wear Plate (Sprag Only) 5 Forward Roller Clutch Cam (Past Design Roller) Retainer & Race Assembly (New Design Sprag) 6 Forward Roller Clutch Assembly (Past Design) Forward Sprag Clutch Assembly (New Design) 6a)Retainers (Part of Forward Clutch Sprag Assembly) 7 Outer Race 8 Input Sun Gear 9 Thrust Washer 10 Input Carrier

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.