It looks like a small piece of the smaller gear broke off then got in the way of the big gear causing explosive disintegration. I'm amazed you could drive at all once it broke. I'm guessing the back differential was just slipping and grinding while the front was actually pushing the car. What a story I loved the "if you don't laugh you'll have to cry" attitude with the "inspection hole" comment.


Sent from my iPhone using Tapatalk Pro

__________________
2011 E70 • N55 (me)
2012 E70 • N63 (wife)