This amazing piece of gearing has appeared on HowStuffWorks prior to. You might realize it from the electrical screwdriver posting. An automatic transmission is made up of two entire planetary gearsets folded with each other into just one part. See How Equipment Ratios Operate for an introduction to planetary gearsets. https://judahxddcz.59bloggers.com/34593277/top-latest-five-gearbox-auto-urban-news