Mine works good with a heavy foot, I tested it one day without trying in a turn lane. Smoked all four rear tires... I can make the rear slide in turns even with a dually. Off road it does well, I pull loads up wet hills coverd in grass. I have not experianced the open diff like performance. It does work less than my other truck with the locker. That thing will slide around much more off road while pulling. So far, I prefer the LS for towing. The locker is brutal sometimes with heavy loads.