Very old film about how and why a diff works.

Even though it's an old film it's very well presented and probably one of the best technical films of it's kind

http://www.youtube.com/watch?v=K4JhruinbWc

Unashamedly nicked off anopther forum. Sorry if it's been posted before but it's worth watching

[Edited on 25/3/11 by ColinM]

Very good. I like the simple use of spokes, then they gradually built it up into the diff that we recognise. Really useful find.

That was actually very useful, although I'd sort of picked up how diffs work I was never really 100% at all, seeing it built up slowly like that it made perfect sense, thanks!

Very good informational video, I like how it makes it from the most simple form possible and slowly builds it up, a must watch!

Really enjoyed that

Don't you just love the american Chumleigh-Warner voice though?