The CTS (= continuous traction system) allows a shifting without using the clutch and without changing the throttle position, but with using ignition cut-offs instead. Shifting with ignition cut-offs requires the engine to be in traction mode, because an ignition cut-off cannot achieve the required torque difference while coasting. A sensor in the gear shift lever or gear shift linkage triggers, at a certain force, the ignition cut-off. Due to the fast torque difference, the current gear is taken out, and, with keeping the gear shift lever pressed, the next gear is engaged. With CTS, faster accelerations are achieved, the shifting process is smoother, and the timing during shifting is optimized (because only one lever must be pressed). The CTS consists of an electronic box (= CTS box) and of two sensors. The first sensor is a force sensor, which triggers when the ignition should be cut-off. The second sensor, a position sensor, detects the mechanical progress of the shifting process (e. g. by detecting the rotation angle of the selector drum), and determines when to end the ignition cut-off. Optionally, a gear shift flash lamp can be connected to the CTS box, which flashes at an adjustable engine speed. Kits and Spare Parts for CTS7 are described in the corresponding sections.