Yes, Yes, and No. I've had the Lincoln Lockers for over a year now, with stock axles, and no problems. I'm sure it wears rear tires faster, but it's not too noticable. Good rotation will minimize this. I run 2 sets of tires, Swampers for the trail, and whatever used cheapies I can find for the road. This keeps the Swampers in decent shape, well, what the rocks don't tear up on the trail
I'd suggest them, driving manners are great. It tracks straighter than ever (never been too bad before) and there are no unexpected lane changes that are associated with automatic lockers. Just have to know what you're doing if thier is ice or snow on the road.[addsig]