In a traditional automated transmission, the gears are literally gears -- interlocking, toothed wheels that enable transmit and modify rotary motion and torque. A combination of planetary gears results in all of the different equipment ratios that the transmission can develop, typically four ahead gears and just one reverse gear. https://gearboxcvt63839.angelinsblog.com/33314460/5-essential-elements-for-gearbox-cvt