REVISED 700R4 FILTER NOISE- WHINE(NEW FILTER & SEAL P/N)

TRANSMISSION APPLICATIONS: SUBJECT: ------------------------- ------- 1982- 1987 THM 700-R4 (MD8) SERVICE AND PARTS INFORMATION ON A NEW TRANSMISSION FLUID FILTER AND FILTER SEAL

TRANSMISSION MODELS: VEHICLE APPLICATIONS: ------------------- -------------------- ALL MODELS 1987 B, F and Y Cars 1987 R, V, S, and T Trucks 1988 C an K Trucks 1987 G and M Vans

Bulletin Covers:

A new design THM 700-R4 transmission fluid filter and filter seal. The new design transmission filter is a wider filter that has a felt element in place of the screen element and a shorter filter neck. The filter also has a molded body that locates over the valve body bolts, thus eliminating the need for the filter retainer clip (87). The new design filter seal (70) is a wider compression type seal that fits snug in its bore.

DATE OF PRODUCTION CHANGE: (Figure 1) ------------------------- Beginning July 6, 1987 (Julian date 187) all 1987 THM 700-R4 transmissions were produced with the new design transmission filter (71) and filter seal (70).

SERVICE ACTION: (Figure 2) --------------- When servicing any 1982 through 1987 THM 700-R4 transmission (built prior to Julian date 187), use the previous design transmission filter and seal until current service stock is depleted. When using the new design filter and seal on any 1982 through 1987 THM 700-R4 transmission (built prior to Julian date 187), the filter retaining clip (87) is not needed and should be discarded.

NOTICE: Care should be taken when installing the new design filter and filter seal. The filter seal is a compression type seal and will fit snug in its bore. Damage to the filter neck could result if the filter is installed incorrectly.

To correctly install the filter and seal, coat the seal with petroleum or Automatic Transmission Fluid and with the seal over the filter neck insert the filter into its bore in the pump assembly. With the palm of your hand gently push downward on the filter until it seats.

SERVICE PARTS INFORMATION:

Part No. Description -------- ----------- 8657926 Package - Filter, Filter Seal and Gasket 8657767 - Seal - Filter Neck (Available Separately)

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.