on a trip out west going down Rockies on 7% grade stopped at pull off for view got back in truck put in drive and it started backing up the mountain with a 14000# fifth wheel attached did it in neutral too got no light or warnings contacted dealer they got no reports and have no idea what might of happened. It goes away and starts working normal but than comes back you can feel it when driving like you have the brake on with or without the camper have a ho Cummins with an ansi transmission any thoughts or experiences
Thank you
Thank you