Have had my Outer Banks for 6 months or so. The transmission control module wants to keep you in a higher gear (better mileage), often a higher gear than it should. I consider it a problem. The vibration or shudder is the engine lugging. That is not good for the engine. Driving in Sport mode alleviates the problem somewhat since sport mode translates to downshifting sooner and staying lower gears longer. The little research I have done makes it seem like this has been an issue for 2-3 years. I am a little surprised there is not more of a fuss being made about this.