4-2 DOWNSHIFT HITCH THM325-4L MODEL/AJ -NEW CONTROL VALVE

SOME 1983 THM 325-4L MODEL "AJ" TRANSMISSIONS MAY EXPERIENCE A 4-2 DOWNSHIFT HITCH. A HITCH IS BEST DESCRIBED AS A TWO SHIFT FEEL WITH A SLIGHT HESITATION AND BUMP IN BETWEEN. THIS CONDITION IS MOST NOTICEABLE DURING A FULL THROTTLE DETENT DOWNSHIFT. LATE IN JANUARY, 1983 A NEW CONTROL VALVE ASSEMBLY WENT INTO PRODUC- TION, TO CONTROL THIS DOWNSHIFT HITCH CONDITION. WHEN SERVICING ANY 1983 THM 325-4L MODEL "AJ" TRANSMISSION FOR THIS DOWNSHIFT HITCH CONDITION, ORDER SERVICE PACKAGE NUMBER 8635949. THIS PACKAGE CONTAINS THE FOLLOWING: 1 - SPRING - 4-3 CONTROL VALVE 1 - SPACE PLATE - CONTROL VALVE ASSEMBLY 1 - PIN - COILED SPRING 1 - INSTRUCTION SHEET FOLLOW SERVICE MANUAL AND INSTRUCTION SHEET PROCEDURES FOR REMOVAL AND INSTALLATION OF THE CONTROL VALVE ASSEMBLY AND SERVICE PACKAGE PARTS.

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.