I started to notice a little noise in the rear diff, then the oil got so hot that it melted the breather and dumped a bunch of the oil out. Man did it smell bad!
I was able to drive it back to camp and after it cooled off I swapped the breather with one off the front, added a little oil, and headed back out. By the end of the weekend it sounded horrible haha
Luckily 91CumminsGuy was selling a rear diff. Hopefully it will be here in time to head to the desert this weekend