I just purchased a new 2019 FX4 XLT with the 5.0 V8 engine. If I accelerate from between 65 and above towing my bass boat, I will get a vibration like a tire is out of balance but once the truck gets to the desired speed, it disappears. I'm curious if any else has experienced this problem. This did not happen with my 2014 F150. The tires are balanced and appears it did not lose a weight. I had just towed my boat back from the dealership the day prior to getting the new truck with no issues.