1-2 Shift Valve

This valve carries out the gear shift between 1st and 2nd gears. When the 2nd brake solenoid valve operates, the line pressure is applied to the shift valve and the valve moves to allow the line pressure to be applied to the 2nd brake and thus the transmission is shifted into 2nd gear. When the oil pressure to the 2nd brake solenoid valve is relieved, the shift valve returns by means of the spring force and the transmission is shifted to the 1st gear. In L or R range, the fluid pressure is applied to the 1st-reverse brake when the 2nd brake solenoid valve operates.