Shifting to R from N
The vehicle is moved backward by engaging the 4th clutch. When shifting to R from N, shift solenoid valve A turns ON, shift solenoid valve B turns OFF, and shift solenoid valve C turns ON, and the manual valve moves to the R position. Line pressure (3) from the manual valve is applied to the shift valve C line pressure port (3) and the reverse inhibitor valve line pressure port (3). 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. As the line pressure (1, 4A) flows from shift valve A to the shift valve C line pressure port (4B) through shift valve B (4A, 4B), shift valve C is moved to the left side. Immediately after moving the shift lever to R from N, A/T clutch pressure control solenoid valve D operates to apply the A/T clutch pressure control solenoid valve D pressure (58) to the 4th clutch through lock-up shift valve pressure ports (58, 58'), shift valve C pressure ports (58', 3B), manual valve pressure ports (3B, 3A), shift fork shaft pressure ports (3A, 3C), and reverse inhibitor valve pressure ports (3C, 40). Then, A/T clutch pressure control solenoid valve D gently applies hydraulic pressure to the 4th clutch, which avoids generating shock while in gear.