While in progress of my 6.0 4l80 swap I decided to service my differential. To my surprise I already have a trutrac and 3:73 gears. Yay considering my rpo codes say other wise. Just thought I'd share what I found today.

 

Factory G80 must have blew up.

 

Yes when I bought the truck I looked at the pumpkin and it had rtv with the gasket , so I knew something had been done but not this