Truck and a tow bar?

Towing an older 4x4 with the transfer case in neutral is OK,provided you go under 45 mph and less than 50 miles--faster or further wil eventually overheat the rear bearing in the transfer case or the slip yoke,from lack of lube,not enough gets splashed around that far up to sufficently lube them and it'll burn them up sooner or later...