I wriggled the input cup around while the case was still assembled and couldn't help but notice a crack going about half the way around where the ring gear goes
I'm going to pick up 2 aluminum cases (front and rear) and make sure the pinions are all shimmed and put it back together. I'm hoping to get by with the ring and pinion I have now though I have a new pinion coming just in case. Thanks for the help guys!