Most presently-made passenger vehicles with gasoline or diesel engines use transmissions with four–10 forward gear ratios (also called speeds) and a person reverse gear ratio. Electrical automobiles normally use a set-gear or two-velocity transmission without reverse gear ratio. It is possible to watch a visual demonstration of manual gear transmission https://ricardoychgj.laowaiblog.com/32920244/not-known-details-about-automobile-gearbox