NEW BOTTOM PAN AND COATING CELLULOSE GASKET

TRANSMISSION APPLICATIONS: SUBJECT: ------------------------- ------- 1984 THROUGH 1988 NEW BOTTOM PAN AND NEW LATEX COATED THM 440-T4 (ME9) CELLULOSE GASKET

TRANSMISSION MODELS: VEHICLE APPLICATIONS: ------------------- -------------------- ALL MODELS A, C, H, E, K, W CARS

BULLETIN COVERS:

A new transaxle bottom pan having a continuous raised rib on the pan rail and new latex coated cellulose gasket (Figure 2). The new pan must be used with the new gasket and will provide a better seal by reducing the potential of crushing or splitting the gasket when the pan bolts are torqued.

DATE OF PRODUCTION CHANGE: (Figure 1) ------------------------- January 5, 1988 (Julian Date 005) all THM 440-T4 transaxles were built using the new bottom pan and new gasket.

SERVICE ACTION:

When replacing the bottom pan on all 1984 through 1988 THM 440-T4 transaxles use the service package listed in the "Service Parts Information" section below. If the previous pan is used with the new gasket, or the new pan is used with a cork gasket, fluid leaks may develop.

SERVICE PARTS INFORMATION:

Service Part No. Description (Contents) -------- ---------------------- 8662942 Transaxle Bottom Pan Package (1) Transaxle bottom pan gasket (latex coated cellulose) (1) Transaxle bottom pan (raised rib) (1) Chip collector magnet

*8668028 Transaxle Bottom Pan Gasket (latex coated cellulose)

NOTICE: Overhaul Seals and Gaskets Package (#8646975) and Overhaul Repair Complete Package (#8646976) have been updated to include the new latex coated cellulose gasket and the previous latex coated cork gasket. These overhaul packages are used on 1987 and 1988 model THM 440-T4 transaxles.

SERVICE MANUAL REFERENCE:

Refer to the THM 440-T4 (ME9) Automatic Transaxle Unit Repair Table Of Contents for bottom pan and gasket service information.

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.