"Some here call Dolly Towing TOAD (Two On A Dolly) and Tow Bar Towing FROG (Four Rolling On Ground)."
OK, if you say so. What I have read is that "TOAD" is a variation of "TOWED". The definition of "FROG", however, is correct, although it is rarely used. Most of the time it is referred to as simply "FOUR DOWN" towing. "On a dolly", of course, means exactly that, 2 wheels on a dolly and 2 on the ground.
It is, however, quite true that generalizations are often false. There is almost always an exception or two!
I have heard of a front wheel drive vehicle (sorry, don't remember which one) that apparently had speed sensors on the rear wheels, and so could not be dolly towed because it confused the computer.
I have never seen an Owners Manual for a four wheel drive or all wheel drive vehicle that states dolly towing is OK. Of course, I haven't read ALL of them.
Generally speaking the ONLY four wheel drive (4X4) vehicles that can be towed four down are those which have a NEUTRAL position in the transfer case. However, that is not always true. There is at least one transfer case in older vehicles that must be modified by welding vanes on a gear for splash lubrication before four down towing is attempted. That transfer case has not been in common use since the late 1970s/early 1980s.
ANY vehicle, up to the size/weight limits of the trailer, can be towed on a trailer, IF the ground clearance will allow it to be driven onto the trailer.
ALWAYS read and follow the instructions in the Owners Manual!
Especially if your vehicle is under a manufacturer's warranty.
Some folks say that certain vehicles are towable despite what the manufacturer says in the book. "Why, I have towed my Flashbang Sport for xx thousands of miles, with no trouble at all!" That does not mean that you will be that lucky with YOUR "Flashbang Sport"!
Good luck.
CM1, USN (RET)
2017 Jayco TT
Daily Driver: '14 Subaru Outback
1998 Dodge QC LWB, Cummins, 5 speed, 4X2
2 Kawasaki Brute Force 750 ATVs.
Pride Raptor 3 wheeled off-road capable mobility scooter
"When seconds count, help is only minutes away!"