Driving in R

The vehicle is moved backward by engaging the 5th clutch and reversing the mainshaft rotation with the reverse idler gear, the PCM turns shift solenoid valve A ON, and uncovers the port of shift solenoid valve A pressure (SA) to shift valve A. Shift valve A is moved to the right side to switch the line pressure port (3') and the reverse CPC pressure port (3B) leading to the 5th clutch. Line pressure (3) flows to the manual valve via the servo valve and shift valve A, and becomes 5th clutch pressure (50) at the manual valve. The 5th clutch pressure (50) flows to the 5th clutch, and the 5th clutch is engaged by line pressure.