That's good advise, thanks. I dropped it off this morning to have the leak fixed in the rear end, and asked if Ford has put out any "vibration stabilizers" he looked at me like I had 2 heads... but was gonna check with the Service Manager to see if Ford Corp. suggests anything.
I do know it's not something that should be happening, my 2 previous F150's never bounced like this, but then again maybe it's the way they intendid the truck to be.