I put this post on one of the other forums, and it struck me it might be important enough to throw in here somewhere. So heads up to anyone thinking about doing this.
I'm not aware of any travel trailers that come equipped from the factory with a gooseneck type hitch. They generally come with a fifth wheel type hitch. There are "adapters" out there to replace the fifth wheel hitch with a gooseneck type hitch. These are very popular with folks who also pull gooseneck trailers and they only have the ball hitch mounted in their trucks.
The problem with this set up comes when you put the gooseneck adapter on a trailer originally designed as a fifthwheel. Because the gooseneck adapter is longer, (it has to reach all the way down to the bed of the truck instead just about the top of the fenders,) it puts a great deal of stress on where the hitch is welded to the trailer.
I speak from personal experience. I put one of these conversions on a 34 foot, 10,000 pound Jayco Eagle. Worked great for a couple of years, and then I noticed screws missing from the sheetmetal underneath the "hood" of the trailer. The frame of the hood was flexing so much from the additional stress of the hitch adapter, I was slowly breaking EVERY weld underneath the hood. When I took the sheetmetal off to see what was going on, I had two small pieces of angle iron holding the entire front of my trailer on. Both ends were cracked, but not completely broken (yet!). Had those two welds finished breaking going the road about 70 mph, the result would've been ugly, I don't care who you are.
Several additional pieces of angle iron, some judicious welding, and sheetmetal being replaced with heavy diamond plate has fixed the problem. I still pull this trailer with the gooseneck adapter, but only because of the work I did to the front of the trailer. If and when I trade trailers, I'll keep the fifth wheel, and get a B&W companion to go with my turnover ball.
The reason I say this I want folks to learn from my mistake. What sounds like a good idea really isn't. Anyone buying a trailer with a gooseneck adapter should have the entire front of the trailer inspected underneath the sheet metal. If you don't see any problems, put the fifth wheel back on and go from there. Do not continue to use a gooseneck adapter on a fifth wheel trailer without beefing up the front end of the trailer. My results could have been truly tragic, but I was lucky.
Live and learn...
'08 F350 CC Lariat DRW
Ordered 12/15/06 Built 02/13/07 Delivered 02/28/07
6.4 L PSD, Auto, Tow Boss, Off-Road
Ranchhand Grill Guard, Headache Rack, Brown's Running Boards
Transferflow 98gal Bed Tank
B&W Turnover Ball, FMJ Spray-in Bedliner
F-450 Front Fender Flares
Spartan Tuned 275HP
Dually Club #83
Any part that you make that is expressly designed to remove a functioning emission component is illegal.