For 1990-2009 cars

# OIL PAN GASKET LEAKS 700R4 TRANSMISSIONS

#### VEHICLES AFFECTED 1982-86 THM 700-R4 Transmissions

Beginning on September 24, 1985 or Julian Date 267, (refer to Figure 1), all models of the THM 700-R4 transmission were built using a new oil pan gasket (part no. 8654799). This new gasket is thinner than the cork type gasket and must be used onl for 1984 through 1986 model year transmission assemblies with oil pans that have a continuous raised rib (refer to Figure 2).

All 1982 and 1983 model year transmissions were assembled with oil pans that do not have a continuous raised rib (refer to Figure 3). When servicing this type oil pan, gasket part no. 8654333 must be used. All overhaul packages have been revised to include both gaskets.

Refer to the appropriate Service Manual for oil pan removal and installation procedures, in addition to the correct bolt torque specifications.

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.