Modern vehicles use helical gears and synchromesh gadgets during the gearboxes, that synchronize the rotation of gears which have been about to mesh. This gets rid of clashing of the gears and helps make gear shifting a lot easier. It absolutely was very first released in 1939 for automobiles. https://gearbox00998.blogs100.com/34276250/the-5-second-trick-for-gearbox