I have a problem.. I'm looking at buying a disc diff but the guy selling it said he has blown the seals and it needs new wheel bearings. Apparently it was damaged from when he went up a gutter. there is no visable damage at all and nothing looks bent but i still want to check for damage. Around how much could it be to get a diff shop to replace the seals and check the condition of the diff? the diff tag says; P/N 92030910. ratio: 3.45. so its a vl turbo diff.