Contemporary autos use helical gears and synchromesh devices inside the gearboxes, that synchronize the rotation of gears that happen to be going to mesh. This eliminates clashing in the gears and can make gear shifting easier. Great article! The thorough breakdown of the different sorts of gearboxes as well https://emilianoulzly.blogsidea.com/40199753/not-known-factual-statements-about-gearbox