I came back from a trip to Wisconsin today in my XJ. Ahead of me coming up the on ramp on the Indiana toll road was a newer model green XJ. I could not tell how fast he was going, but I gained on him quickly. I decided to pass him at the same time he decided to speed up. Both front wheels on that XJ wobbled like you wouldn't believe. He had to slow down to maintain control but watching the wobble was quite a show.