I've been shopping for a used RV. The one I'm currently considering is 32ft coming at 7900 lbs dry. Its GVW is 9600 lbs, just over what my Expy is rated for. Although the tires I have on it have a higher max capacity then the OEM tires so I think it will take it. I'm pretty sure the truck will be an absolute dog with that much weight so Im planning on getting a tuner and tunes from 5 star tuning. Has anyone else had any success or failure with a trailer this big?
Not that its recommended but I occasionally tow over the 9100lbs. IF you do, its at your own risk.... make sure you have a weight distributing hitch and that you have load range D or E tires with 60+psi. I find that with my Expy its not so much the total weight but the tongue weight as the independent rear sags out a good bit. I tow my rock buggy out to moab from denver truck and trailer about 9700lbs. it does very well, not a speed demon up the passes but still 50MPH or so. i avg 10.5mpg while towing that load. I also do not run a programmer as I find most just add fuel and raise rev limiter. I don't want it to work harder in those situations.