Abstract: A gearbox for a motor vehicle having at least one input shaft and one output shaft and including a plurality of gears. The gears can be engaged and disengaged by an actuator. The gearbox further includes a parking brake that can be actuated by a gear change actuator and that serves to block rotation of the output shaft. The parking brake can be a gear and pawl arrangement in which the pawl is selectively engageable with the gear to prevent gear rotation, or it can be in the form of a shiftable jaw clutch.

Abstract: A motor vehicle transmission system blocks the disengagement of the clutch (14) and the shifting of the transmission (12) into neutral for starting the engine (10), if the transmission is already in gear at the time the system is switched on. The blocking is canceled if the main brake (58) is applied and the application of the brake (58) is confirmed by a brake sensor (56), or if the driver moves a shifter element (24) from a non-neutral shift-gate position to the neutral shift-gate position after the system has been turned on.

Abstract: A torque transfer system, particularly an automated shift transmission of a motor vehicle, has a movable shifter element that is subject to a position-dependent force. The gear positions of the transmission correspond to minima of potential energy of the position-dependent force, so that the movable element will have a tendency to fall into the nearest one of the shift positions. To perform a gear shift, the movable shifter element is moved into the vicinity of the targeted gear position by means of a control device directing a shift actuator. When the movable shifter element has stopped moving within a given tolerance band of the targeted position, the control device generates a stall-releasing signal, e.g., a series of pulses of alternating polarity to overcome a holding force or holding torque of the movable element, so that the latter will seek a position of minimum potential energy and thus move towards the targeted gear-shift position.