Gears for other works by using are even older than automobiles, and stays of ancient gears are already uncovered courting back to 4th century China. The whole world’s oldest Operating clock has actually been applying gears to inform some time in Salisbury Cathedral considering the fact that 1386.  Handbook transmissions https://lorenzohhebw.madmouseblog.com/14634643/automobile-gearbox-fundamentals-explained