Fashionable vehicles use helical gears and synchromesh gadgets inside the gearboxes, that synchronize the rotation of gears which have been going to mesh. This removes clashing in the gears and would make gear shifting simpler. In this process, the gears are in constant mesh. They may be safer from damage, https://automobile-gearbox39516.dailyblogzz.com/34713331/not-known-factual-statements-about-automobile-gearbox