In a traditional computerized transmission, the gears are literally gears -- interlocking, toothed wheels that aid transmit and modify rotary motion and torque. A mix of planetary gears results in all of the several equipment ratios the transmission can generate, normally 4 forward gears and one reverse gear. A CVT, https://martinwywsp.pages10.com/not-known-facts-about-gearbox-cvt-69506339