I am not super mechanically smart and I need clear explanations to understand the smallest concepts that some of you guys don;t even need to think through.....
Anyway while trying to figure out the why and hows of the differential, I found that video (from the 30's apparently) and was able to understand the whole concept and figured I could share it on the forum for people that like to have clear explanation tools...

[ame="http://www.youtube.com/watch?v=K4JhruinbWc&feature=related"]http://www.youtube.com/watch?v=K4JhruinbWc&feature=related[/ame]