For 1990-2009 cars

# NEW TRANSAXLE I.D. CODES INFO. ON NEW OVERHAUL PACKAGES

#### MODELS AFFECTED: 1989-1990 DE VILLES, FLEETWOODS, ELDORADOS, AND SEVILLES

Due to changes in 3rd clutch fiber material for production and service parts, transaxles produced after Julian Date 076 (March 17, 1989) must be serviced with a revised overhaul package and clutch plate assembly. Transaxles built after that date contain a new spacer plate, 3-2 control spring, 2-3 accumulator spring, and revised 3rd clutch material. Model code designations were also changed to allow easy identification.

#### MODEL CODE CHANGES

Old Model New Model --------- --------- AAH ACH ABH ADH AFH AHH

#### Service Parts:

When replacing the 3rd clutch fiber plates on 1989 or 1990 models for any reason, check the two-letter model code on the identification tag. Refer to Figure 1. Order overhaul packages, 3rd clutch plate assembly packages, and valve body assemblies according to the model code. The reference chart below lists proper service parts for recalibrated models built after March 17, 1989.

Valve Body Spacer Plate 3rd Clutch Overhaul Model Code I.D. Last 4 Numbers Plate Assembly Package ---------- ---- -------------- -------------- -------- AC, AD, AH 9A-3 5213 8662990 8662989

Harsh or slip-bump 2-3 and 3-2 shifts will occur if parts are mixed.

#### IMPORTANT: The revised 3rd clutch plates may have markings as shown in Figure 2 - four black stripes about 1/8" wide with no notch in one of the teeth.

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.