Contemporary vehicles use helical gears and synchromesh gadgets within the gearboxes, that synchronize the rotation of gears that are going to mesh. This eliminates clashing from the gears and makes equipment shifting less complicated. An unsynchronized handbook transmission, normally often called a "crash box," is probably the earliest designs. It https://devinqwvtr.thekatyblog.com/32871400/the-2-minute-rule-for-automobile-gearbox