Don't worry about the Truxxx, I am positive that guy has something loose or rubbing.
He or the shop will get it worked out, there are way too many of us who have had the Truxxx for a long time, with no issues.
I say again, my bet is that he is getting a tire lug rubbing on the skid plate, slight bend and it disappears.

The first time I had a tire rub the skid plate, I thought the front end was gonna fly off.
