Hi All! New member: I have had my P90DL for a bit over a week. I love the car. Absolutely amazing. Every once in a while the car will make a sound from the front that sounds like i'm driving over a weak rumble strip. It lasts for 0.5 to 1s or so. It doesn't happen under acceleration, just under weak regen. It starts and stops suddenly. It's fairly faint. I think i can feel it through the steering as well. I drive the car not in range mode and with ludicrous on all the time. Normal?