For 1990-2009 cars

# 3-4 SHIFT BUSYNESS 200-4R DUAL PUMP SLIDE SPRING

SOME 1983 THM 200-4R OZ MODELS MAY EXPERIENCE A 3-4-8 SHIFT BUSYNESS CONDITION IN WIDE OPEN THROTTLE. BEGINNING WITH 1984 PRODUCTION ALL THM 200-4R OZ MODEL TRANSMISSIONS WERE BUILT WITH A DUAL PUMP SLIDE SPRING. (FIGURE 1). WHEN SERVICING ANY 1983 THM 200-4R OZ MODEL TRANSMISSION FOR THIS CONDITION ORDER THE PARTS LISTED BELOW. 1 8639562 SPRING, PUMP SLIDE 1 8639563 SPRING, PUMP SLIDE 1 8634047 GASKET PUMP COVER TO CASE

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.