In a conventional computerized transmission, the gears are practically gears -- interlocking, toothed wheels that help transmit and modify rotary movement and torque. A mix of planetary gears generates all of the different gear ratios which the transmission can generate, typically four ahead gears and a single reverse equipment. https://cvt97529.tinyblogging.com/the-fact-about-gearbox-cvt-that-no-one-is-suggesting-76039171