Quote Originally Posted by JDNSW View Post
Actually the early 80" did have constant four wheel drive, only with a free wheel unit (as stated) instead of a centre diff to allow the front wheels to travel further than the rear on turns. In some ways a better system than a centre diff. Only drawback was the need to lock the freewheel for reversing or for maximum engine braking on downhill slopes.


John
Well perhaps I misunderstand the concept of "freewheel" and "constant".

constant 1. adj. not subject to variation; continual,never ceasing for long. (The Pocket Oxford Dictionary)

I interpret this as - while the machine is freewheeling it is not constantly driving all four wheels. If the freewheel is engaged permanently, I think I am correct in saying that the gearboxes can suffer from wind-up on firm surfaces. Therefore the early 80" do not have constant four wheel drive such as the Discovery has; without getting into one of those technical arguments about whether all four wheels are driving constantly anyway,

Cheers Charlie