I bought a 2000 Wrangler TJ a couple of weeks ago. This is my first Jeep. I noticed when I'm driving the passenger's side looks lower. So I took some measurements. First I put a level on the front bumper. The passenger side is a little lower. Then I measured to the edge of the bumper on both sides and the passenger side is about 1/2 inch lower than the driver's side. What could be wrong?