[Video] How a Differential Works from 1937

Although most people nowadays know how a rear differential works, back in 1937 it was probably a little harder to comprehend. This video is truly a blast from the past, from it’s visual examples to its background music. These days how-to videos can be done with vast amounts of technology and graphs, and sometimes can feel a little convoluted. So it’s almost refreshing to see a video like this with a more primitive demonstration of how something works.

Via Motor Authority