A transmission, comprising: an input shaft; an actuation piston disposed in a chamber of the input shaft, the actuation piston and the chamber in fluid communication with a hydraulic actuation circuit; a dog clutch having male and female members (50, 58), wherein one of the male and female members are coupled to the actuation piston for common movement therewith; a sensor sleeve disposed in the actuation piston and having i) an internal through channel in fluid communication with the hydraulic circuit, and ii) a reduced diameter sensor portion (128, 148) extending from one end toward the other end of the sleeve and terminating at a shoulder, the sensor portion extending through an exterior wall of the actuation piston and movable relative the actuation piston; a control system configured to: upon receipt of a shift command to a gear requiring the dog clutch to be engaged from a disengaged state, command a supply of pressurized hydraulic fluid against an engagement side of the actuation piston thereby causing i) the actuation piston and associated dog clutch member to advance toward an engaged state, and ii) the sensor sleeve to advance in a same direction as the actuation piston until its shoulder engages the exterior wall of the actuation piston; determine when a terminal end of the sensor portion contacts a wall of the input shaft chamber; upon determining the terminal end of the sensor portion of the sensor sleeve has contacted the chamber wall, determine that the dog clutch male and female dog clutch members are in a predetermined partially engaged state less than a fully engaged state of the dog clutch members; and command the transmission to shift to the gear requiring engagement of the dog clutch; wherein a length of the reduced diameter sensor portion of the sensor sleeve from the terminal end to the shoulder directly corresponds to the predetermined partially engaged state of the dog clutch that is less than a fully engaged state of the male and female members of the dog clutch. an input shaft; an actuation piston disposed in a chamber of the input shaft, the actuation piston and the chamber in fluid communication with a hydraulic actuation circuit; a dog clutch having male and female members (50, 58), wherein one of the male and female members are coupled to the actuation piston for common movement therewith; a sensor sleeve disposed in the actuation piston and having i) an internal through channel in fluid communication with the hydraulic circuit, and ii) a reduced diameter sensor portion (128, 148) extending from one end toward the other end of the sleeve and terminating at a shoulder, the sensor portion extending through an exterior wall of the actuation piston and movable relative the actuation piston; a control system configured to: upon receipt of a shift command to a gear requiring the dog clutch to be engaged from a disengaged state, command a supply of pressurized hydraulic fluid against an engagement side of the actuation piston thereby causing i) the actuation piston and associated dog clutch member to advance toward an engaged state, and ii) the sensor sleeve to advance in a same direction as the actuation piston until its shoulder engages the exterior wall of the actuation piston; determine when a terminal end of the sensor portion contacts a wall of the input shaft chamber; upon determining the terminal end of the sensor portion of the sensor sleeve has contacted the chamber wall, determine that the dog clutch male and female dog clutch members are in a predetermined partially engaged state less than a fully engaged state of the dog clutch members; and command the transmission to shift to the gear requiring engagement of the dog clutch; upon receipt of a shift command to a gear requiring the dog clutch to be engaged from a disengaged state, command a supply of pressurized hydraulic fluid against an engagement side of the actuation piston thereby causing i) the actuation piston and associated dog clutch member to advance toward an engaged state, and ii) the sensor sleeve to advance in a same direction as the actuation piston until its shoulder engages the exterior wall of the actuation piston; determine when a terminal end of the sensor portion contacts a wall of the input shaft chamber; upon determining the terminal end of the sensor portion of the sensor sleeve has contacted the chamber wall, determine that the dog clutch male and female dog clutch members are in a predetermined partially engaged state less than a fully engaged state of the dog clutch members; and command the transmission to shift to the gear requiring engagement of the dog clutch; wherein a length of the reduced diameter sensor portion of the sensor sleeve from the terminal end to the shoulder directly corresponds to the predetermined partially engaged state of the dog clutch that is less than a fully engaged state of the male and female members of the dog clutch.