This wonderful piece of gearing has appeared on HowStuffWorks in advance of. You could possibly understand it from the electric screwdriver article. An automatic transmission has two entire planetary gearsets folded with each other into a person part. See How Gear Ratios Operate for an introduction to planetary gearsets. Cars https://fernandotefjk.blogchaat.com/34219287/rumored-buzz-on-gearbox-auto