Vehicular power transmitting system

A vehicular power transmitting system including a dog clutch having a synchro-mesh mechanism, which dog clutch is provided to selectively connect and disconnect a rotary shaft having external teeth, and a clutch gear rotatable relative to the rotary shaft, to and from each other, the clutch gear having a tapered outer circumferential surface, the vehicular power transmitting system comprising:

• a first piston disposed within a center bore formed through the rotary shaft such that the first piston is axially reciprocable;
• a sleeve connected to the first piston and having internal teeth meshing with the external teeth of the rotary shaft so that the sleeve is rotated with the rotary shaft, and such that the sleeve is axially reciprocable together with the first piston according to axial movements of the first piston;
• a synchronizer ring supported in sliding contact with the tapered outer circumferential surface of the clutch gear such that the synchronizer ring is rotatable relative to the clutch gear;
• and
• an actuator including a second piston to axially advance the first piston for thereby bringing the internal teeth of the sleeve into meshing engagement with the clutch gear through the synchronizer ring,
• and wherein the first piston and the second piston are disposed coaxially with the rotary shaft.