A sleeve stroke SSt of a specific sleeve is gradually increased from “0” (after t1) in a state in which a vehicle is stopped, a transmission is in a neutral state (all sleeve strokes SSt=0 (original position)), a clutch is in a disengaged state (clutch stroke CSt=0 (original position)), and an engine is operating (engine rotational speed NE>0). Upon determination that the sleeve stroke SSt has reached a predetermined value A, at which synchronization operation of a corresponding synchronization mechanism is performed, the sleeve stroke SSt is fixed to the predetermined value A, and an operation of increasing the clutch stroke CSt from “0” in a press engagement direction is started (time t2). An engagement start point CStlearn of the clutch is obtained based on a change in the rotational speed Ni of an input shaft Ai of the transmission after that (time t3).