Gears for other utilizes are even more mature than automobiles, and remains of historic gears have been learned dating again to 4th century China. The whole world’s oldest Operating clock has been applying gears to inform the time in Salisbury Cathedral considering that 1386.  CarBikeTech can be a technical website. https://automobile-gearbox74061.aboutyoublog.com/38067047/automobile-gearbox-an-overview