Main Valve Body
The main valve body contains the manual valve, the modulator valve, the torque converter check valve, the shift valves A, B, D, E, the CPC valve C, the cooler check valve, the relief valve, the lock up shift valve, the lock up timing valve, the lubrication control valve, the lubrication check valve, and the ATF pump gears. The primary function of the main valve body is to switch fluid pressure on and off and to control hydraulic pressure going to the hydraulic control system.