TRANSMISSION CONTROL DEVICE

PROBLEM TO BE SOLVED: To effectively prevent a contamination from being engaged into an electromagnetic valve.SOLUTION: On the basis of a detection signal of a cleaning actuation condition, when it is determined that a cleaning control condition is established, cleaning control of a solenoid selector valve is performed. Consequently, each solenoid selector valve is subject to changeover control, and a piston of each shift cylinder is returned to a normal position. When it is determined that the piston of each shift cylinder is at the normal position, speed control is performed according to a shift position of a change lever, and operation of a vehicle is started. Consequently, a contamination is effectively prevented from being engaged into a solenoid valve for a long term.