Towing with a dolly?
Pull the shaft. But remember, once the shaft is pulled, park doesn't work.
A lesson learned:
http://www.forabodiesonly.com/mopar/showthread.php?t=113699
Had an oh-sh*t moment one time unloading a scout off my buddies car trailer.
The truck was 2wd sitting on a small hill, when the scout started over the end of the trailer, it lifted the rear of the truck up and... truck, trailer, scout took off down hill towards his dad's new camping trailer, he just bought it a week or so before.
We were lucky the truck jack knifed....
Truck: trashed the bed side
Scout: totaled
His dad's camper un-touched, thank God its the only reason I can type today.