For 1990-2009 cars

# OIL LEAK/1983 THM 200C,350C SPEEDOMETER DRIVEN GEAR SLEEVE

IF AN OIL LEAK IS ENCOUNTERED ON THE ABOVE TRANSMISSIONS IN THE AREA BETWEEN THE SPEEDOMETER DRIVEN GEAR AND DRIVEN GEAR SLEEVE, IT MAY BE CAUSED BY THE INSIDE DIAMETER OF THE SLEEVE BEING OVERSIZED. TO CORRECT THIS CONDITION, REPLACE THE SLEEVE WITH A NEW PART.

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.