It was common within the early twentieth century for its ease of use compared to completely guide gearboxes of that point.  An unsynchronized guide transmission, often referred to as a "crash box," is amongst the earliest styles. It lacks synchronizers, which implies gears don't immediately match velocity through shifts. Mike https://automobile-gearbox52839.blog-a-story.com/14935430/the-smart-trick-of-automobile-gearbox-that-nobody-is-discussing