Pulling a 3670RL, with a 2010 F350, Diesel. At slow speeds taking turns, I'm getting an awful shutter, vibration, in the front end, felt in the steering wheel, definitely front end related. Brand new tires, new brakes all around. It's much more drastic when towing, but still a little noticeable when not in tow. Anyone have similar issues??.....bringing the truck in on wed, to be looked at, but any thoughts would be appreciated.