Tried to pay close attention on the drive this morning, but didn't notice anything like that. Hoping you find it though!Yah it’s hard to pinpoint exactly but I feel it in the frame, but I only get it between 1800-2000. It’s very minor but when I accelerate through that range i feel it and then over 2000 it smoothed out again. I do not get anything above 2400 though and mine is not audible, only a feeling