On Saturday I could hear a crunchy noise during that 12 minute main. I thought I had picked up a rock between one of the arms and outdrives. That's happened to me a couple times in the past after a few minutes it went away. Last night I was cleaning the car up and noticed that there was a lot of dirt around the center diff. On closer inspection it wasn't dirt but ground up metal. Then I noticed the pinion...
Hmmmm, maybe that was the problem.
Luckily the steel spur looks fine. I think I may have set the mesh a little too loose.