The synchro ring rotates slightly because of the frictional torque from the cone clutch. A leather-faced cone clutch is used. This drove the rear wheels via a cone clutch and four speed gearbox. Drive was to the rear axle through a cone clutch and three speed gearbox. It had a four-speed gearbox with cone clutch, shaft and bevel-drive back axle. Transmission was via a cone clutch, 4 speed gearbox and chains propelling the rear wheels. As the name implies, a cone clutch has conical friction surfaces. A cone clutch serves the same purpose as a disk or plate clutch. Both these vehicles had a leather cone clutch that was entirely separate from the flywheel. It contained a main cone clutch and two epicyclic gears, allowing four forward speeds.