Just bought my son a 2008 Wrangler 2dr., It has a 3.5" spring lift and 315/70R17 BFG's on it. It has a slight wobbling feeling in the steering wheel at around 25 to 30 mph. You can let go of the wheel and see it moving back and forth, left to right. It goes away on it's own if you speed up or slow down? Anybody ever hear of anything like this?