Patent ID: 8225695

Claim:
An arrangement for inhibiting axial movement of a range clutch in a transmission, the transmission comprising a main shaft and an output shaft, the range clutch being movable on the output shaft between a high range position and a low range position to modify a main shaft rotational speed to at least one different output shaft rotational speed, and a plurality of selectable gears comprising a forward gear and a reverse gear for providing different speed ratios between an input shaft and the main shaft, the main shaft rotating in a main shaft forward rotational direction and in a main shaft reverse rotational direction when coupled to the input shaft and in the forward gear and in the reverse gear, respectively, the output shaft rotating in an output shaft forward rotational direction and in an output shaft reverse rotational direction when coupled to the main shaft rotating in the main shaft forward rotational direction and in the main shaft reverse rotational direction, respectively, the arrangement comprising: a driver adapted to move the range clutch axially on the output shaft between the high range position and the low range position; a sensor arrangement adapted to sense at least one of reverse rotational direction and potential reverse rotational direction of at least one of the main shaft and the output shaft and to generate an inhibit range shift signal upon sensing at least one of reverse rotational direction and potential reverse rotational direction; and a controller adapted to inhibit operation of the driver upon receipt of the inhibit range shift signal from the sensor arrangement.