For 1990-2009 cars

# PRODUCT CAMPAIGN REAR AXLE RATIO 1980 FIREBIRD

IN ADDITION TO THE PARTS SHOWN ON THE ORIGINAL DEALER PRODUCT CAMPAIGN BULLETIN 80-C-13, TWO PARTS ARE REQUIRED TO COMPLETE THE CAMPAIGN ON INVOLVED VEHICLES.

WHEN INSTALLING THE SPEEDOMETER DRIVEN GEAR, PART NUMBER 9774413, TO THE TRANSMISSION, A SEAL AND SLEEVE ASSEMBLY, PART NUMBER 1362284, AND AN "O" RING SEAL, PART NUMBER 6264904, ARE REQUIRED TO PROVIDE PROPER CONTACT WITH THE SPEEDOMETER DRIVE GEAR.

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.