For 1990-2009 cars

# 3-2 DOWNSHIFT FLARE/325-4L/OE REQUIRE NEW CONTROL VALVE

#### MODELS AFFECTED: 1982 & 1983 RIVIERAS EQUIPPED WITH 5.0L ENGINES (VIN CODE Y) AND THM 325-4L MODEL "OE" TRANSMISSIONS

#### NOTICE: This bulletin supersedes Bulletin 83-173, File Group 70, Number 31, dated August 1983, to include updated informatim (adds 1982 mOdels). Please discard original Bulletin and replace with new Bulletin 83-173A.

Som 1982 thru 1983 Rivieras equipped with 5.0L (Vin Code Y) engines and THM 325-4L "OE" mOdel transmissions may experience a 3-2 downshift flare which is most noticeable at 25-30 m.p.h.

When servicing any 1982 thru 1983 THM 325-4L "OE" model transmission for this 3-2 downshift flare, order service package number 8635953.

SERVICE PACKAGE 8635953 CONTAINS:

1 Cotrol Valve Assembly 1 Pressure Regulator Spring 1 Intermediate Servo Cushim Spring 1 Control Valve Spacer Plate 1 3-4 Accumulator Spring 1 Instruction Sheet

Follow guidelines given in your service manual for installation procedures of items contained in this service package.

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.