gooseneck on 5er
The "Gooseneck" is a 2 5/16" ball that sits in the bed of the truck. The Fifth Wheel, of course, uses a kingpin like the big trucks. There is an adapter that clamps to the kingpin and converts the hitch to a gooseneck. I sold an All American last year and the customer picked it up because he lived close to the Forest River factory. My salesman watched him bolt on his adapter, and as soon as the jacks came off the ground, he told the customer he had just voided his frame warranty. He then recorded the VIN number, just in case he had trouble. I am very glad he has NOT had trouble. With the gooseneck, you will have to add safety chains. I sell one of these adapter every now and then, but I would advise against it. Oh course, you have to do what is best for you.