Got the truck back and the got the definition of 'broken' etc. Funny how you notice things that aren't right once you realize what to look for and you can step back a couple of feet to look at them. They had the truck up on a rack over a pit so I could see things from further back and gain a better perspective.
Top Front Mount on the differential busted clean through. I never even looked up at the top of the case...

Explains the lack of leaking oil. No visible damage to the differential from any impacts to explain the break.
Passenger side mounting bracket is shifted out of position and, therefor, also causing issues such as not being able to center the differential.
Passenger side Half Shaft is not in line with the differential axle tube which causes the racket when reversing while turning.
My guess is the stress on the case mount on the driver's side caused by the passenger side bracket being shifted to the outside finally got to the 'straw that broke the camel's back' point and it let go.
Will work with the guys at Gears to see what the next steps are:
- Exchange the differential under warranty? Can't see this as their fault except alignment issues with the differential should have been discovered at the time of install.
- Exchange differentials and leave out for repair of passenger side mounting brackets either by Gears or a frame shop
- Exchange differentials and leave out until lift is done with differential drop kit (BDS)
- Front axle swap out for Solid Front Diff kit....