A method for determining an actuating-travel range between two shift-element halves of a form-locking shift element (A, F) during an engagement of the shift element (A, F) and in the presence of a tooth-on-tooth position between the two shift-element halves is provided. An actuating movement of the at least one movable shift-element half with respect to the other shift-element half is monitored by a sensor. A tooth-on-tooth position is detected when it is determined, by the sensor, within an actuating-travel range of the at least one movable shift-element half between a disengaged condition and an engaged condition of the shift element, that the actuating movement of the movable shift-element half in the engagement direction is zero. A ratio between an engagement force applied at the shift element and a radial force acting on the shift-element halves is within a value range, which facilitates a tooth-on-tooth position and an actuating movement of the shift-element half in the engagement direction is detected by the sensor after the reduction of the engagement force and/or after an increase of the applied torque.