Make:’s photo editor, Sam Murphy, sent us a link to this 1930s Chevrolet educational video which describes how a differential gear works. Skip ahead to 1:50, if you don’t want to see the rest of the video (which is highly entertaining throughout).
How Differential Gear works [Thanks, Sam!]
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Gareth Branwyn is a freelance writer and the former Editorial Director of Maker Media. He is the author or editor of over a dozen books on technology, DIY, and geek culture. He is currently a contributor to Boing Boing, Wink Books, and Wink Fun. And he has a new best-of writing collection and “lazy man’s memoir,” called Borg Like Me.
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Low Center Drive = Hypoid Gearset which is more of a sliding contact requiring EP sulfide additives to give the heavy oil greater shear strength.
Pretty good visuals, now we need to add limited-slip and positraction!