Automatic selector device for multi-gear change-speed gearbox

An automatic selector device of a multi-gear change-speed gearbox, the selector device having a multi-way valve arranged to activate selector actuators each used for a gear, the multi-way valve being arranged to be driven into several valve positions each associated with one gear by a valve actuator operatively activated by an electronic control unit, valve positions of one of the selector actuators being exclusively associated with an appropriate gear and causing a selection action while other selector actuators remain in a rest position, wherein a stop moves relative to the valve housing along a path of motion of an opposing stop fixedly attached to the valve and can be fixed relative to the valve housing with respect to the valve positions to be blocked by a manually actuatable selector actuator, wherein the opposing stop is arranged to move with a valve element of the multi-way valve, the valve element taking up in each of the gears an associated valve position relative to a valve housing, whereby relative freedom of movement between the stop and the opposing stop correspond to a selected gear range.