A method is proposed for blocking inadmissible gearshift processes in a transmission with a plurality of shifting devices which, to carry out a shift process, are moved by actuating devices when a shift command is sent by a control unit (TCU) to the relevant actuating device. The actuating devices are connected for data exchange with one another and with the control unit (TCU) in such manner that the actuating device of the shifting device to be shifted is activated provided that clearance has been given by at least one other actuating device. In addition a shifting system is proposed for a transmission with a control unit and a plurality of actuating devices for the actuation of shifting devices, such that the actuating devices are associated with at least one shaft (A, B) and such that the actuating devices are connected for data exchange with one another and with the control unit (TCU) in such manner that the actuating device of the shifting device to be shifted can be activated provided that clearance has been given by at least one other actuating device.