1st or minimal-speed equipment, by functioning the gear shift lever, the larger sized gear on the key shaft is moved along the shaft to mesh with the main equipment on the countershaft. This allows the driving force to choose between ahead or reverse, park, neutral push, and sport driving modes. https://connerzfhge.laowaiblog.com/33131172/helping-the-others-realize-the-advantages-of-automobile-gearbox