THM 325-4L TRANS OIL PAN LEAKS NEW ACCUMULATOR HOUSING

TRANSMISSION BOTTOM OIL PAN LEAK-1982 AND 1983 THM 325-4L

Some 1982 and 1983 Eldorados and Sevilles equipped with THM 325-4L transmissions may exhibit a transmission oil pan leak which is caused by an interference between the 1-2 and 3-4 accumulator housing and the transmission bottom oil pan.

Beginning late in March, 1983, all THM 325-4L transmissions were produced using a new accumulator housing (Figure #1) to correct the interference condition.

When servicing any 1982 or 1983 THM 325-4L transmission for a bottom oil pan leak, inspect for interference with the accumulator housing when the pan is removed. If evidence of an interference exists, remove the accumulator housing and grind or file off a portion of the casting boss (Figure #2 Inset). When removing this material, use caution to avoid damaging the cup plug. Remove only a minimum amount of material from the accumulator housing to eliminate its interference with the transmission oil pan.

For warranty purposes, use labor Operation Number T6080 at 1.5 hours.

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.