regulation device 17 and the second subsidiary regulation device 27 regulates the friction ring of the second subsidiary transmission 24 by way of the second servomotor 30 as well as the second regulation device 25 in terms of its axial position in such a manner that only the second reference variable 28 is used for generating the second control variable 29 in this embodiment the reference variable 28 in turn consists of a regulation variable of the first subsidiary transmission 11 made available by the first regulation variable detection 20 and a regulation variable of the second subsidiary transmission 21 made available by the second regulation variable detection 30 in this connection the reference variable 28 evaluated by the subsidiary regulation device is formed by the difference in the speed of rotation of the friction rings 14 24 whereby here too an axial position of the first friction ring 14 for example can be used possibly with the inclusion of a position offset characteristic field to take a calibration measurement into consideration in deviation from the measurement devices of the regulation variable detections 20 30 described in fig1 in this embodiment a speed of rotation measurement of the friction rings at the small guide wheels 5 of the adjustment devices 15 25 is provided in that the speed of rotation of the small guide wheels 5 themselves is detected it is immediately evident that slip can occur between a small guide wheel 5 and a friction ring as well and therefore the measurement of the speed of rotation of the friction ring can be subject.