Running 38x14.5's on a 2015 JK and a while back noticed the steering wheel was ridiculously difficult to turn while sitting in still at idle on rough blacktop. Revving up was not really much help, it was so bad my wife actually could not turn the wheel. If the vehicle is on a smother surface like a garage floor or moving at all, the steering works very easy as you would expect. The only other possible info that may be relevant is the front axle was switched to a Dana 60. I have installed a complete PSC system which works great, The reason for the question is I have a friend that wants the old box and I don't want to give it to him if it could be a problem for him.