towing manual trans

It all depends on how the transmission and transfer case work.
If the oil pump or oil slingers inside the rearmost gearbox keep spinning and lubricating the gears inside while going down the road (rear driveshaft spinning but front input not spinning), then you're probably OK.

Other designs disconnect almost all gears inside so you don't have much inside spinning.

For vehicles that need the front input spinning to insure gearbox lubrication, you generally need to add in a rear driveline disconnect so the gearbox doesn't turn at all.

So yes, read the manual!

wthibeaux wrote:
I told him to check the owner's manual to make sure it was towable.

the only valid source, IMHO.
bumpy

REMCO.com

Here is what someone gave me when we were asking the same questions about toads. 2013 and 2014 are free, earlier years are $1.99 per year for the download.

Motorhome Magazine Guide to Dinghy Towing