[chris.817]

I don't have first hand knowledge but I'll chime in with the thoughts from sailboat transmissions. Unless you leave a boat in gear, the propeller will "free wheel" much like the outcome of dollying or flat towing a manual transmission car. The rule of thumb is that you start the motor and run the transmission to circulate lubrication once per day.

I would equate that to something like short distances are fine. 2-3000 miles across country and you might want to pull the car off and drive it a 10-20 miles once or twice during the trip.

Obviously, auto transmission drives shaft MUST be disconnected or placed on the dolly.

my .02...