Gears for other makes use of are even more mature than automobiles, and stays of historic gears are actually discovered dating back to 4th century China. The world’s oldest Doing work clock continues to be employing gears to inform enough time in Salisbury Cathedral due to the fact 1386.  Handbook https://simonjjkhf.tinyblogging.com/automobile-gearbox-for-dummies-77814022