HIGH PITCH WHINE NOISE 1ST,2ND & REVERSE-1983 MODEL 200C/200R

SOME 1983 THM 200-C AND 200-4R TRANSMISSIONS MAY EXPERIENCE A NOISE CONDITION THAT SOUNDS LIKE A HIGH PITCHED WHINE. THIS NOISE MAY BE COMING FROM THE FRONT INTERNAL GEAR ASSEMBLY, AND SHOULD NOT BE CONFUSED WITH A TORQUE CONVERTER BEARING NOISE OR A PUMP CAVITATION NOISE. IN DIAGNOSING THIS CONDITION, IF THE NOISE IS NOTICEABLE IN DRIVE WITH THE BRAKE APPLIED AND THE ENGINE AT APPROXIMTELY 1500 R.P.M. THE CAUSE COULD BE A TORQUE CONVERTER BEARING NOISE OR AN OIL PUMP CAVITATION NOISE. IF THE WHINE NOISE IS NOTICEABLE WHEN DRIVING THE CAR IN FIRST, SECOND AND REVERSE ONLY***THE NOISE COULD BE THE FRONT INTERNAL GEAR... WHEN SERVICING ANY 1983 THM 200-C OR 200-4R TRANSMISSION FOR THIS WHINE NOISE CONDITION AND THE CAUSE HAS BEEN DIAGNOSED TO BE THE FRONT INTERNAL GEAR.....REPLACE IT WITH PART NUMBER 8630909. (5-23-83)

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.