In a conventional automatic transmission, the gears are practically gears -- interlocking, toothed wheels that assistance transmit and modify rotary motion and torque. A mix of planetary gears produces all of the various gear ratios the transmission can produce, generally four ahead gears and a single reverse gear. Primary Pulley: https://gearboxcvt30516.blogproducer.com/41220483/gearbox-cvt-for-dummies