PROPER USAGE OF SPACER PLATE GASKETS IN OVERHAUL KIT

Models Affected: 1982-1989 FIREBIRD, PARISIENNE AND SAFARI

BULLETIN COVERS:

Instructions for choosing the correct spacer plate gaskets from the transmission overhaul service package. Current information enclosed with the service package may be unclear when explaining which spacer plate gaskets are appropriate for use.

Two sets of spacer plate gaskets are supplied with each transmission overhaul service kit. One set of gaskets is for use on model years 1982 through 1986, and the other set is for use on model years 1987-1989.

The difference between the two sets of gaskets is the addition of holes in 1987 to accommodate an auxiliary valve body. Transmissions produced Start of Production or after the 1987 model year may or may not have an auxiliary valve body, but 1987-1989 model years must use gaskets with holes for an auxiliary valve body even if an auxiliary valve body is not used.

If a 1987 or later transmission does not have an auxiliary valve body - the spacer plate covers up the unused holes in the spacer plate gaskets.

NOTICE: If the incorrect (1982-1986) gasket set is used on a 1987-1989 model year transmission, with or without an auxiliary valve body, the third clutch exhaust passage will be blocked. This may cause slipping or flaring during a 3-2 shift, a delayed 3-2 downshift, or a burned 3-4 clutch.

SERVICE PARTS INFORMATION:

Model Year Part # Gasket Set Only Part # Overhaul Kit ---------- ---------------------- ------------------- 1982-1986 8642993 8649995 1987-1989 8657938 8649995

Part number 8649995 is expected to be available on June 19, 1989. Until then, normal part orders will not be accepted by GMSPO. Only verifiable emergency VIP orders will be accepted. SPO will make every effort to obtain parts. All parts will be placed on 400 control to waive VIP surcharges. However, the part will be shipped premium transportation at dealer's expense. All other order types will be canceled as incorrectly ordered while the 400 control is in place.

Part numbers 8642993 and 8657938 are currently available from GMSPO.

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.