Contemporary vehicles use helical gears and synchromesh devices inside the gearboxes, that synchronize the rotation of gears that are about to mesh. This gets rid of clashing in the gears and can make gear shifting much easier. General Motors’ Hydra-Matic, introduced in 1940, was amid the first, using a hydraulic https://automobilegearbox06272.csublogs.com/41175512/automobile-gearbox-an-overview