So I have been noticing since I bought my truck from time to time when you hammer on it from low speeds through the acceleration there is a jump/surge...and not the shift point but a surge in the acceleration. This past weekend I towed a 38ft boat to Destin, FL and had the exhaust brake and tow-hual on almost the whole time which I thought it was but also had it happen once or twice with them off?? Any ideas or any of y'all experience the same thing?