I'm not fer sure, but the t-case should have a Neutral mode, read the owners manual. As for towing it behind an RV; all of the vehicles I've seen, are setup for that. They've been to a shop somewhere and had the hitch installed on the front, then had some electrical work done. When the RV applies it's brakes the towed vehicles brake lights need to come on as well. I think the fancier setups even apply the vehicles brakes, not sure if it's a hydraulic, an electric, or a pneumatic mechanism. There may be some work done to the steering system too, dunno. I looked at a setup on a K2500 Yukon XL but I don't remember the specifics.