3-4 SHIFT FEEL MORE DESIRABLE NEW SERVICE PACKAGE

A MODIFIED CONTROL VALVE ASSEMBLY SERVICE PACKAGE (PART NUMBER 8634943) IS NOW AVAILABLE FOR ALL 1981 BY MODEL THM 200-4R TRANSMISSIONS. TO SERVICE BY MODEL TRANSMISSIONS BUILT AFTER OCTOBER 7, 1980, USE SERVICE PACKAGE AS RECEIVED. TO SERVICE BY MODEL TRANSMISSIONS BUILT PRIOR TO OCTOBER 7, 1980, DO NOT USE ANY 3-4 ACCUMULATOR SPRING DURING REASSEMBLY. SEE FIGURE 2. * USE OF THIS SERVICE PACKAGE AS EXPLAINED ABOVE WILL RESULT IN A MORE DESIRABLE 3-4 SHIFT FEEL. * SERIAL NUMBER INFORMATION: 1.THE THM 200-4R TRANSMISSION SERIAL NUMBER REPRESENTS THE BUILD DATE OF THE TRANSMISSION. FOR EXAMPLE: BY MODEL 81 YEAR 10 BUILD MONTH 06 BUILD DAY 80 BUILD YEAR IN APRIL, 1981, THE FORMAT OF THE SERIAL NUMBER WAS CHANGED AS FOLLOWS: 097 DAY OF BUILD YEAR 1 SHIFT BUILT T 3 RIVER PLANT 81 MODEL YEAR BY MODEL 0740 JOB ORDER THAT DAY * ILLUSTRATION IN BULLETIN *

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.