I finally got around to doing my 3.73 swap and after breaking down the explorer rear for the ring and pinion, and then the fox 8.8 to swap them over, I noticed the differential in the fox rear had rust on the spider gears! This was a spare rear I had sitting in the garage for a while, but it has oil in it and I did not expect this... I first thought about soaking it in all kinds pof stuff and trying to save it. But I think it's just not worth it. Unless some old school guy here has a way to get it done...? So now i am on the hunt for a differential. I thought about just using the one in my fox. But it's my daily driver and I can't have any unwanted hold ups like this. Plus, the chassis has over 350k miles on it. And I am sure the rear has never been touched.