Synchromesh gears are generally used by contemporary autos in the gearbox, which synchronizes the rotation of gears which might be messed. This kind of gear gets rid of the chance of equipment clashing and will make the shifting approach easier. This gearbox is someway similar to a constant mesh gearbox. https://automobile-gearbox20974.elbloglibre.com/34122996/new-step-by-step-map-for-automobile-gearbox