Driving in R

The vehicle is moved backward by engaging the 4th clutch and reversing the mainshaft rotation with the reverse idler gear. Shift solenoid valves A and B remain OFF, and shift solenoid valve C turns ON when the vehicle moving backward. As shift solenoid valves A and B remain OFF, shift valve C is moved to the right side by a spring force to connect the line pressure port (3) on shift valve C and the line pressure port (3B) leading to the reverse inhibitor valve. The reverse inhibitor valve is moved to the left side by the shift solenoid valve C pressure (SC) to connect the line pressure port (3C) from the shift fork shaft on the reverse inhibitor valve and the 4th clutch pressure port (40) leading to the 4th clutch. The line pressure (3) from the manual valve is also applied to the shift fork shaft line pressure port (31) through the reverse inhibitor valve line pressure ports (3, 3'), which moves the shift fork shaft to the right side, and connects the port (3A) from the manual valve on the shift fork shaft to the line pressure port (3C) leading to the reverse inhibitor valve. With this shift valve C, reverse inhibitor valve, and shift fork shaft movement, the line pressure (3C) becomes 4th clutch pressure (40) at the reverse inhibitor valve, and flows to the 4th clutch. Then the 4th clutch is engaged by 4th clutch pressure (40).