I came across a really cool black and white video made by GM in the 1950’s about how differentials work.
Its made in black and white, and is simple enough in demonstrating how a differential works that anyone can understand it !
Its on youtube, click on the link below to watch the video.
NOTE: this video is 9:00 minutes long so be patient, and the first 2:00 minutes or so is showing some motorcycle choreography stunts which leads into the differential explanation.
