In a standard automated transmission, the gears are pretty much gears -- interlocking, toothed wheels that help transmit and modify rotary motion and torque. A mix of planetary gears produces all of the different gear ratios the transmission can generate, usually 4 ahead gears and one reverse gear. A CVT, https://edwinfouyz.blog4youth.com/34804455/5-simple-statements-about-gearbox-cvt-explained