ANYONE KNOW THE REASON WHY??

[Coloradobus]

We are contemplating a small toad. Been looking at Ford Ranger Stick shift 4X4 which is the guides say with tranny stick in neutral and transfer case twist knob in the 2Hi position. Rangers have remained unchanged from 1993 to 2011. Rangers can be towed for unlimited miles, but at ONLY 55 mph.. Anyone know a mechanical reason why one can't tow a Ford Ranger manual 4X4 faster than 55 mph.

Car Two: Anyone tow or know someone who tows a Honda Element All wheel Drive.
Blue Ox makes baseplates for 2002 Elements and up to 2009. The current FMCA guides don't list the Element. The one we have looked at is 2007, and most RV guides don't even list the Element. Who knows the procedure,, we don't have an owers manual yet to read , "HOW TO"