Driveshaft clunk? There's a fix for that.
I've noticed that when I accelerate at half throttle or more from a dead stop, my driveshaft would make a clunking noise. It's done this since it was stock, but became more pronounced lately. Anyway, I took it into Ford earlier this week and my service advisor was well aware of the problem. He told me it has occurred on several newer model F-150's. Basically, they just R&R'd the driveshaft, re-lubed the slip yoke, and test drove it to confirm the problem no longer existed.
My truck now actually feels much better when accelerating from a dead stop, and there's no more clunk. Just thought I'd share this in case anyone else was experiencing it.