Typical gear selector for an automatic transmission An automatic transmission (in some cases abbreviated AT) is often a multi-speed transmission Employed in motor motor vehicles that doesn't demand any enter from the driver to alter forward gears under usual driving ailments. ­The center of consideration will be the planetary gearset. https://gearboxauto87317.ambien-blog.com/40603190/the-definitive-guide-to-gearbox-auto