Most automatic transmissions use hydraulic power to move gears, combining a torque or fluid coupling converter with gear sets that offer the auto’s preferred selection of ratios. Bill Pugliano/Getty Visuals ­If you have ever driven a vehicle using an automatic transmission, then you already know there are two big differences https://gearboxauto57034.webbuzzfeed.com/34294778/an-unbiased-view-of-gearbox-auto