DETENT SUPPORTING SPRING PRODUCTION DESIGN CHANGE

BEGINNING MARCH 13, 1981, THE FOLLOWING THM 400 TRANSMISSION MODELS WERE BUILT WITH A NEW DESIGN MANUAL DETENT SUPPORT SPRING (SEE FIGURE NO. 1). TRANSMISSION MODEL FF TRUCKMODEL/ENGINE OPTION K-2500 W/L25-4.8 LITER (292 C.I.D.) TRANSMISSION MODEL FH TRUCKMODEL/ENGINE OPTION K-2500 W/LS9-5.7 LITER (350 C.I.D.) TRANSMISSION MODEL FN TRUCKMODEL/ENGINE OPTION K-3500 W/LE8-7.4 LITER (454 C.I.D.) TRANSMISSION MODEL FQ TRUCKMODEL/ENGINE OPTION C/G/P-2500 W/L25-4.8 LITER (292 C.I.D.) TRANSMISSION MODEL FW TRUCKMODEL/ENGINE OPTION K-2500 W/LT9-5.7 LITER (350 C.I.D.) TRANSMISSION MODEL FY TRUCKMODEL/ENGINE OPTION P/K-3500 W/L25-4.8 LITER (292 C.I.D.) THE MANUAL DETENT SUPPORT SPRING, P/N 8633096, IS ASSEMBLED ON TOP OF THE MANUAL DETENT ROLLER AND SPRING 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.