NEW BOTTOM PAN AND COATING CELLULOSE GASKET

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

Models Affected 6000, BONNEVILLE AND GRAND PRIX VEHICLES --------------- EQUIPPED WITH 440-T4 TRANSMISSION

BULLETIN COVERS:

A new transaxle bottom pan having a continuous raised rib on the pan rail and new latex coated cellulose gasket has been released (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.