I know a guy who had welded diffs, had nothing but problems. works great on rocks but crappy driving around in snow, didn't like it too much in mud. Me being in Canada, I like not having the rear come loose every time I try to take a corner
I do not argue the obvious advantage of havin power to all four drive wheels, would have saved me from a couple stucks. I'm saving up for a locker.
I would honestly prefer a heavy-duty posi front and rear if it was availible. .