CHUGGLE AT 35-45 MPH WITH TCC ENGAGED-REVISED PROM RELEASED

SUBJECT CHUGGLE AT 35-45 MPH WITH TORQUE CONVERTER CLUTCH ENGAGED - REVISED PROM

MODELS/YEARS 1986-87 CUTLASS CIERA, EIGHTY EIGHT AND NINETY EIGHT MODELS WITH 3.8L ENGINE AND 44OT4 (4T60) TRANSAXLE -----------------------------------------------------------------------------

Some owners of 1986 and 1987 Cutlass Ciera, Eighty Eight and Ninety Eight models equipped with 3.BL (VIN B & 3) engine and standard axle ratio may experience a condition of chuggle at 35-45 MPH with the torque converter clutch engaged. If the condition cannot be repaired using currently published service and diagnostic procedures, it may be necessary to install a revised calibration PROM.

The PROMs are currently available through GMSPO under the following numbers.

TRANSAXLE AXLE SERVICE SCANNER BROADCAST YEAR MODEL RATIO PART NO. I.D. NO. CODE ---- ----- ------------- -------- -------- --------- 1986 Cutlass Ciera F17/2.84 16158376 8394 AWWY

1986 Eighty Eight FP3/2.73 16158375 8404 AWWZ

1986 Ninety Eight F17/2.84 16158377 8384 AWWX

1987 Eighty Eight, FP3/2.73 16158373 8414 AWXA Ninety Eight

1987 Cutlass Ciera F17/2.84 16158372 8424 AWXB

Note: PROMs are certified for all 50 states.

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.