We have a 2014 Jeep Grand Cherokee Limited that the manual says is towable. After completing the 12 step program using a paper clip to depress a tiny hidden button and standing outside on one leg and hopping 3 times in a circle it is supposed to be flat towable.
We have friends with an SUV that can only be towed 200-250 miles before they have to stop and unhook and drive it awhile before they can rehook and proceed. Guess it is to circulate fluids that require the engine running to be involved and not just rolling down the road behind a coach.
We were at an RV Park a few years ago having morning coffee and breakfast. A coach pulled up to the office getting ready to head out. Wife pulls up behind it in their toad and they hook it up to the coach. As they rolled out I noted the tires on the toad were not turning. That and the screetching rubber on pavement sound told me something was not right. I bailed out of the RV and ran down and pounded on their coach to get them to stop and check their toad. They had only moved about 25' so no damage that I know of. A few adjustments to the toad and they were on their way to better mileage and less tire wear.
Fun times in the RV'ing Community.