Shift Valve

1 - 2
This valve switches between 1st and 2nd gears. It is subject to the spring force, hydraulic pressure (6) (force to push the valve to the left) and hydraulic pressure (3) (force to push the valve to the right) which is generated by operation of the shift solenoid No.2.

When in the 1st gear, as hydraulic pressure (line pressure) is applied to (3), the valve moves to the right and the hydraulic pressure (line pressure) applied to (4) is shut off.

Also when the gear is shifted to "L" or "R" range, hydraulic pressure applied to (2) passes through the valve and (1) to cause the 1st & Rev brake to operate.

When in the 2nd gear, as hydraulic pressure (line pressure) is not applied to (3), the valve moves to the left. In this way, the hydraulic pressure applied to (4) passes through the valve and (5) to cause the 2nd & 4th brake to operate.





2 - 3
This valve switches between 2nd and 3rd gears. It is subject to the spring force, hydraulic pressure (4) (force to push the valve to the left) and hydraulic pressure (5) (force to push the valve to the right) which is generated by operation of the shift solenoid No.1.

When in the 2nd gear, as hydraulic pressure (line pressure) is not applied to (5), this valve moves to the left and the hydraulic pressure applied to (3) is shut off.

When in the 3rd gear, as the hydraulic pressure (line pressure) is applied to (5), this valve moves to the right and the hydraulic pressure applied to (3) passes through the valve, (7) and 3 - 4 shift valve to be applied to the 2nd & 4th brake which is thus released.





3 - 4
This valve switches between 3rd and 4th gears. It is subject to the spring force, hydraulic pressure (4) (force to push the valve to the left) and hydraulic pressure (1) (force to push the valve to the right) which is generated by operation of the shift solenoid No.2.

When in the 3rd gear, as hydraulic pressure (line pressure) is not applied to (1), this valve moves to the left and the hydraulic pressure applied to (2) passes through the valve, (8) and the coast clutch modulator valve to operate the coast clutch. Meantime, the hydraulic pressure is applied to (5) passes through the valve and (6) to be applied to the 2nd & 4th brake which is thus released.

When in the 4th gear, as hydraulic pressure (line pressure) is applied to (1), the valve moves to the right. In this way, the hydraulic pressure applied to (2) passes through the valve, (7) and the 3 - 4 shift valve to be applied to the 2nd & 4th brake which is thus engaged. Also, because the valve moves to the right, the fluid passages from (2) to (8) and from (5) to (6) are closed and the coast clutch is released.