While at a speed when not under acceleration or deceleration truck has sound of a yoke bearing going out. Low growl with mild vibration. Told dealer, Cronin CJDR in Lebanon OH, about problem 2 times now during routine maintenance schedules. I am told that they can't repeat problem, although I have sat and waited once and the truck never left the bay. I have worked on cars unprofessionally for 30 years now and it sounds like a yoke nut is loose or the bearing is going out and the gears are not properly aligned. But who am I? See more issues with my truck.