Modern-day vehicles use helical gears and synchromesh devices within the gearboxes, that synchronize the rotation of gears that are about to mesh. This eradicates clashing from the gears and will make gear shifting much easier. Torque converter does the exact same perform the clutch does from the handbook gearbox https://gearbox43074.slypage.com/34366931/not-known-factual-statements-about-gearbox