I kept looking around and talked with a couple of people online, and I am now thinking that the best and most economical way to go is with a locker. Powertrax seems to have the best deal going for a locker unit that is reported to be fairly quiet and provides a 100% locking differential, except when turning. The using goes for about 400 bucks, and from all accounts, is a pretty easy garage installation. Does anyone have anything bad to say about this product?