Most now-developed passenger vehicles with gasoline or diesel engines use transmissions with 4–10 forward equipment ratios (also known as speeds) and a single reverse equipment ratio. Electrical motor vehicles generally use a fixed-equipment or two-velocity transmission without reverse gear ratio. Automated gearboxes appeared commercially while in the 1940s, according to https://automobilegearbox28404.blogrenanda.com/40000239/details-fiction-and-automobile-gearbox