[HawgRyder]

Walt...I just realised from your post...
If the front cooler is blowing...and the tire had something to do with it...then yes...maybe a piece of junk got into the line in the return line from the front cooler to the tank.
This would effectively block the flow AFTER the cooler...and prevent the oil from reaching the tank.
The pressure would build up...but because the relief valves in the case are for the pressure side of the sysytem...the scavenge side of the pump would be dead ended.
It's just a matter of the weakest link...in this case it appears to be the thin area of the front cooler.
Bob