Method and control unit for operating a transmission

A control unit for operating a transmission (3) that comprises a hydraulic pump and at least one form-locking shift element (A, F), the hydraulic pump drivable on a transmission-input end, the at least one form-locking shift element (A, F) comprises two shift-element halves (10, 11) that are engageable with each other in a form-locking manner, at least one of the shift-element halves (10) is displaceable between a first end position, which corresponds to an engaged operating condition of the form-locking shift element (A, F), and a second end position, which corresponds to a disengaged operating condition of the form-locking shift element (A, F), by a hydraulic pressure of the hydraulic pump, wherein a current position of one of the shift-element halves (10) is monitored with a sensor, the control unit configured to:

• detect the current position of the one of the shift-element halves (10) and storing the current position as a specified end-position value when the one of the shift-element halves (10) is located in one of the first and second end positions, the hydraulic pump is driven, and the shift-element half is actuated by the hydraulic pressure towards a demanded end position;
• when the hydraulic pressure is less than a threshold value, determine a deviation between the current position of the one of the shift-element halves and the specified end-position value;
• and
• increase the hydraulic pressure when the deviation is greater than a threshold value.