We currently have a 2001 3/4 ton Ram diesel with a 5th wheel hitch for towing our RV. We have purchasec a larger RV and need to by a 1 ton. We want to upgrade to a 2002 or better, but understand that we have to get a new 5thwheel hitch. Does anyone know if they have come up with an adapter or conversion kit that will work with the old 5thwheel hitches or do you have to purchase a whole new hitch?:--)