Patent ID: 8770053

Claim:
A transmission device comprising: a single electric motor; clutches capable of connecting or shutting off power transmission from the electric motor; a controller configured to control motions of the electric motor and the clutches; a shift/select shaft configured to be rotated around its center axis thereby to perform a shifting motion, and configured to be moved in an axial direction thereby to perform a selecting motion; a first driving power transmitting mechanism configured to allow the shift/select shaft to perform the shifting motion using a power from the electric motor via one of the clutches; a second driving power transmitting mechanism configured to allow the shift/select shaft to perform the selecting motion using a power from the electric motor via the other of the clutches; and a guiding mechanism configured to guide the selecting motion and the shifting motion of the shift/select shaft up to respective terminal end positions, wherein the controller shuts off the clutch at a predetermined timing when the electric motor is decelerated and before the shift/select shaft arrives at the terminal end position of one of the shifting motion and the selecting motion, and moves the shift/select shaft up to the terminal end position of the one of the shifting motion and the selecting motion with an inertia of a driven part of the clutch.