TRANS OIL EXHAUSTING OUT 700R4 GASKET INFORMATION. GMC Truck S15 Pickup - 2WD 1983

For 1990-2009 cars

# TRANS OIL EXHAUSTING OUT 700R4 GASKET INFORMATION

#### MODELS: 1983-1984 LIGHT DUTY WITH THM 700-R4 TRANSMISSION

THIS BULLETIN CANCELS AND SUPERSEDES 84-B-29 (DECEMBER, 1983). ALL COPIES OF WHICH SHOULD BE DESTROYED.

Beginning July 15, 1983 (Julian date 169) all 700-R4 transmissions were produced using a new oil pump cover (Figure No. 1) and a new pump to case gasket (Figure No. 2), that prevents transmission oil from exhausting out the breather during harsh deceleration or during sharp turns.

When servicing any 1983 orr 1984 THM 700-R4 transmissions for transmission oil pump cover and pump to case gasket use the service packages listed below:

#### Models Order Service Package Number ------ ----------------------------

3TS,3TZ,3T8,3TP 8642995 3MH,3VJ,3TL,3YH

3T2,3VA,3YN,3ML 8642996 3TC,3MB,3MC,3MJ 3VN,3TE,3TH,3TK 3MD,3ME,3MK,3MW 3VH,3MP,3MS,3T7 3YF,3YG,3PQ,3YP, 3YK,3Y9

These service packages contain both a new oil pump cover and a new pump to case gasket.

#### Notice: the new pump to case gasket cannot be used with the past oil pump cover. The past pump to case gasket can be used with the new oil pump cover, but oil will continue to exhaust out the breather.

Refer to your service manual for disassembly and reassembly procedures.

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.