Doobydarby,
I was just reading your other thread, very exciting by the way, and I saw that you are really enjoying the '
Sport Chrono' feature. This kind of supports my suspiscion that you might just be coming off the throttle too fast. I noticed with my car that with
Sport Chrono on, it's difficult not to be abrupt with the throttle, at least not until you spend some serious seat time behind it. This thump, is it happening in both
SC modes? That might rule out my suspicion, or confirm it. Give it a try.