For 1990-2009 cars

# 200C TRANSMISSION 3-2/2-1 COASTDOWN CLUNK

SOME 1982 CO, CK, AND C7 MODEL THM 200-C TRANSMISSIONS MAY EXHIBIT A 3-2 AND 2-1 COASTDOWN CLUNK CONDITION. THIS CONDITION IS MOST NOTICEABLE AT 5-10 M.P.H. BEGINNING WITH THE START OF PRODUCTION FOR 1984, ALL THM 200-C TRANSMISSION ARE PRODUCED USING A NEW CONTROL VALVE SPACER PLATE WITH AN ORIFICED EXHAUST TO CORRECT THIS 3-2 AND 2-1 COASTDOWN CLUNK CONDITION. WHEN SERVICING ANY 1982 CO, CK OR C7 THM 200-C TRANSMISSION FOR 3-2 AND 2-1 COASTDOWN CLUNK CONDITION, ORDER SERVICE PARTS LISTED BELOW. PART NUMBER CONTENTS IDENTIFICATION 1982 CO MODEL 1 - SPACER PLATE, PART NO. 8648331 CONTROL VALVE SPACER PLATE

1982 C7 OR CK MODEL 1 - SPACER PLATE PACKAGE NO. 8638928 CONTROL VALVE

1 - SPRING, INTERMEDIATE SPACER PLATE SERVO CUSHION

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.