CRUISE CONT/3RD-4TH SHIFTING NEW VLV. ASSEMBLY 2004R

SOME 1982 AND 1983 THM 200-4R, "BY" MODEL TRANSMISSION MY EXPERIENCE A BUSY SHIFTING CONDITION WHILE IN CRUISE CONTROL. BUSY SHIFTING REFERS TO REPEATED SHIFTING BETWEEN FOURTH AND THIRD GEAR. THIS CONDITION IS MOST NOTICEABLE WHILE DRIVING UP INCLINES. BEGINNING IN LATE JANUARY, 1983 WITH STARTING SERIAL NO. 3 BY-025, A NEW DESIGN CONTROL VALVE ASSEMBLY WENT INTO PRODUCTION FOR ALL 1983 THM 200-4R "BY" MODEL TRANSMISSIONS TO CORRECT THIS BUSY SHIFTING CONDITION. WHEN SERVICING ANY 1982 OR 1983 THM 200-4R "BY" MODEL TRANSMISSIONS BUILT PRIOR TO STARTING NO 3 BY-025, FOR THIS BUSY SHIFTING CONDITION, ORDER THE FOLLOWING SERVICE PACKAGE: 1-8634987---THE SERVICE PACKAGE CONTAINS THE FOLLOWING: 1 - 3-4 THROTTLE VALVE 1 - BUSHING, 3-4 THROTTLE VALVE 1 - SPRING, 3-4 THROTTLE VALVE 1 - PIN, COILED SPRING 1 - INSTRUCTION SHEET WHEN SERVICING ANY 1983 THM 200-4R "BY" MODEL TRANSMISSION BUILT AFTER STARTING SERIAL NO. 3 BY-025, THIS 8634987 SERVICE PACKAGE CANNOT BE USED, OR A NO FOURTH GEAR CONDITION WILL RESULT. REFER TO THE INSTRUCTION SHEETS CONTAINED IN THE SERVICE PACKAGE AS WELL AS YOUR SERVICE MANUAL FOR ASSEMBLY AND DISASSEMBLY PROCEDURES FOR THE CONTROL VALVE ASSEMBLY.

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.