Dumb question but I don't know the answer so I'm asking it anyway.

Whats the differences ? Could someone post a pic for me ?

can't find a photo of an atlas axle for some reason...

English diff fits from front and is bigger diameter tubing, Atlas diff fits from rear with cover bolted on from rear.

Ford axle recognition pictures are HERE with big thanks to Rob Lane

Thank you guys, I have a cortina axle, it looks like the atlas photo, correct ? Diff in from rear ?

Cortina 3,4,&5 had Atlas axles.