I've got this kinda loud clicking noise coming from somewhere in the driveline, sounds like the rear/right rear, on my '14 FX4. It happens when I shift from Park to Reverse and then from Reverse to Drive. Also, it'll do 2-3 more click noises as I accelerate. I towed my 17 ft boat the other day and the load from the trailer made the problem even worse. It's seeming like it could be the U joint(s). I took it to the dealer on Tuesday and after taking a quick look, they told me to bring it back on Monday (because they were full) and that their plan was to change out the driveshaft and see if that fixed it. They said they never had one do this before but they'd take care of it. As soon as the slack in the drivetrain is taken up by moving forward or backward, I get this loud click. With only 1,300 miles on the truck, I'm hoping this gets figured out ASAP. Any of you experience this same issue?