In a standard computerized transmission, the gears are literally gears -- interlocking, toothed wheels that help transmit and modify rotary motion and torque. A mix of planetary gears results in all of the several gear ratios which the transmission can create, typically four ahead gears and a single reverse gear. https://gearboxcvt28494.bloguetechno.com/the-best-side-of-gearbox-cvt-69276165