ABRUPT 3-2 AUTOMATIC DOWNSHIFT REPAIR INFORMATION

SOME OWNERS OF 1987 PONTIAC J AND N CARS WITH TURBO ENGINE AND AUTOMATIC TRANSMISSION MAY COMMENT ABOUT A POTENTIALLY HARSH 3-2 DOWNSHIFT DURING A PASSING MANEUVER. THE CONDITION IS MOST LIKELY TO OCCUR IN THE 40-55 MPH SPEED WINDOW AND BEFORE THE NORMAL TORQUE CONVERTER CLUTCH (TCC) UNLOCK.

REPAIR THIS SPECIFIC CONCERN WITH THE FOLLOWING ECM PROM REPLACEMENT:

PONTIAC J AND N AUTO TRANS. P/N 16120036

FOR OTHER AUTOMATIC TRANSMISSION RELATED CONDITIONS, REFER TO SERVICE MANUAL SECTION 7.

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.