Most automatic transmissions make use of hydraulic energy to move gears, combining a torque or fluid coupling converter with gear sets that offer the vehicle’s wanted selection of ratios. Several parts of the planetary gear established are engaged and disengaged by clutch packs, also known as friction discs or plates. https://gearboxauto85206.blogdanica.com/33746137/the-best-side-of-gearbox-auto