My 10 bolt rear ate a pinion seal, and when I went to change it, I realized that the pinion yoke has a lot of play in it. My dad and I think its the pinion bearings. We noticed the gear oil resembled grayish chocolate syrup, so we decided to pull the cover. It was full to the top of this mixture, we think it blew the bearings when I got stuck in a mudhole a week or two ago, and then muddy water leaked in through the seal. We also discovered that although my vin had the G80 code, there was no Govlock, but an open diff. We were gonna try to fix it ourselves or replace the rearend(until the junkyard quoted me $550 for a rear 10 bolt 3.73!!), but Ive started to wonder if a 3/4 ton swap might make sense. I have a set of 16-7 stock rims of a 3/4 ton suburban my parents had, and I saw on the Muddevils site that someone had a bunch of 11R16 Michellins (38'' tall) for around 150 a set for new. So I was wondering if anyone drove with Michellins on their DD, my driving normally does not go over 45-50 mph, and my wheeling consists of trails and mud.