This amazing bit of gearing has appeared on HowStuffWorks before. You could identify it from the electrical screwdriver short article. An automatic transmission is made up of two finish planetary gearsets folded alongside one another into a single part. See How Gear Ratios Get the job done for an introduction https://gearbox-auto19639.frewwebs.com/34667642/not-known-details-about-gearbox-auto