Tech 101: How a differential works

This Jam Handy Chevrolet video from 1937 – uploaded to YouTube by USAutoIndustry – has received a lot of attention over the years, in part because it does such an excellent job of explaining the inner workings of a differential, going through each and every step from the problem (how to get two linked wheels to turn at different speeds around a corner) to the end result. Jump to the two-minute mark if you want to skip all the motorcycle cop theatrics and get right to the tech.