I'm looking to buy a truck that is local to me, and needs a good bit of work. I was hoping for some advice from you all. The truck in question is a 95 Sierra Z71, 350. Looks decent enough, engine runs beautifully, and the tranny was replaced 40k ago (with paper work). The bad, is that the rear end locked up at some point and needs to be replaced. I went out to look at the truck, and was unsure of a few things. The drive shaft is detached from the rear end, and held up by bungee cords. The entire underside of the bed and frame are covered in gear oil, and the pinion shaft (not the housing) is pointing up at ~30°. The drivers side rear tire is completely chewed up, and basically looks like it was spun until it was ready to fail. As near as I can tell, it looks like the diff failed catastrophically while the truck was in motion. Here is my concern. I can't drive the truck before I buy it. I have no problem replacing a rear myself, but I'm concerned about the other stuff. The seller seems like a trustworthy guy, but I'm still skeptical. If a diff decides to grenade itself while moving, bad enough to suck the pinion back into the pumpkin, then there HAD to be a massive drive line shock that sent a huge force up into the transfer case... right? Is the transfer case and/or tranny shot? Should I buy it, replace the diff, and be happy? Or should I run like hell from this? Granted, it isn't that pretty, and certainly needs some work, but it runs beautifully, and it's cheap. Thoughts? Thanks in advance for all of your advice.