Patent ID: 8483918

Claim:
A method of operating a transmission ( 1 ) with at least one positive-locking shifting element (A, F) having at least two shift element halves ( 6 , 7 ) that are brought into positive-locking engagement with one another in an area of tooth profiles ( 4 , 5 ) such that the positive-locking shifting element (F) is disengaged and engaged, by relative movement (W 6 ) which is a function of an actuation force of the positive-locking shifting element (F), between a first end position (S 1 ) of the shift element halves ( 6 , 7 ) that is equivalent to a disengaged operating condition of the positive-locking shifting element (F) and a second end position (S 2 ) of the shift element halves ( 6 , 7 ) that is equivalent to an engaged operating condition of the positive-locking shifting element, and, during the engaging process, an occurrence of a tooth-on-tooth position at the positive-locking shifting element (F) is monitored, in which the shift element halves ( 6 , 7 ) are positioned (S 3 ) between the first end position (S 1 ) and the second end position (S 2 ) without interlock and are only in frictional engagement with one another in an area of front faces ( 4 A, 5 A) of their tooth profiles ( 4 , 5 ), and when a command is received for engaging the positive-locking shifting element (F), the positive-locking shifting element (F) is acted upon with the actuation force (p_FS) which actuates the shift element in an engaging direction, the method comprising the steps of: determining, when a command is received for engaging the positive-locking shifting element (F), a current rotational speed difference (n_F) between the shift element halves ( 6 , 7 ) of the positive-locking shifting element (F) and current positions (W 6 ) of the shift element halves ( 6 , 7 ); and changing the actuation force to a release level (p_FA), if the speed difference (n_F) is smaller than a first rotational speed difference threshold value (n_Fd 1 ) and a tooth-on-tooth position of the positive-locking shifting element (F) is detected, to release the tooth-on-tooth position such that the actuation force at the release level (p_FA) produces a speed difference (n_F) between the shift element halves ( 6 , 7 ) which is above a second rotational speed difference threshold value (n_Fd 2 ).