If you get a wheel off the ground with QT2 you don't need to nothing the torque break traction control will stop that wheel and send the power to the other wheel. Unless you're really into off roading and do it all the time a locker is a waste of money. The computer system does a great job at handling just about everything you can throw at it. If you need more wheel slip just hit the ESP button once if you need a lot more slip hold it down til you here the chime. The best locker you can buy for on road use is a selectable one. I have had two wheels off the ground a lot and the computer has always kicked in kept me moving.