No problems. Yet. 1350mi on my 5.0 and it's a beast! Love that truck! I have a flaw in the paint from the factory. Not noticeable at all. Looks like the gun loaded up and it has a little "blob" on the paint right next to the tailgate handle. Don't consider that a problem. Dealer actually pointed it out at delivery and said they will fix it but I'm afraid to let them take it. Don't want to chance them screwing up my truck.