Check out the Motorhomes Dingy Towing Guide. It is a fairly comprehensive list of toads that can be towed 4 down and what, if any, mods need to be done. There are separate lists for each year. Remco is also a good source in information.
Paul, Kathy, and Tux a 4 month Mini Schnauzer
2014 Tiffin Phaeton 42 LH, 2013 Honda CRV
"When the time comes to look back, make sure you'll like what you see"