Patent ID: 8652003

Claim:
A transmission device which can transmit power imparted to an input shaft to an output shaft while changing a speed by switching an engagement side frictional engagement element, which is at least one of a plurality of hydraulic frictional engagement elements which operate with hydraulic pressure from a hydraulic control unit, from a released condition to an engaged condition, comprising: a speed change control unit which, when upshifting the speed in an accelerator on condition, executes an engagement control including a torque phase control after executing a filling control, which controls the hydraulic control unit in such a way that a hydraulic servo of the engagement side frictional engagement element is filled with hydraulic oil, and a standby control, which controls the hydraulic control unit in such a way that hydraulic pressure for the hydraulic servo is maintained at a preset standby pressure; and a correction unit which corrects at least one of an execution time of the filling control and the standby pressure to an increment side when a fluctuation in a rotational acceleration of the input shaft exceeding a preset determination reference is detected after the torque phase control has been started until the torque phase control finishes.