It is slightly nose down. We use sport mode unless we're approaching a hill. Then we kick it into manual. I'll have to do a few more short trips out before we do our long trips into the mountains again this summer. See if I can perfect the ratio on the brake controller. I don't think it's the wheel bearings. It spins freely when jacked up. The smell from the TT wheels comes after long, windy, downhill roads. We're not used to Towing with a smaller vehicle. We've had a 3500 Ram Turbo Diesel dually for several years now that is used to tow a gooseneck. It's too bad we can't use it for personal use being as it's a company truck. :(