Im not upset or anything....i just know that it is pointless me carrying on an arguement that i have insufficient background knowledge on........i have worked on countless amounts of these things but i cannot really speak for newer equipment as most of my experience is related to the older Landrovers........i do know the new Discoverys are permenant 4x4
on ours at work it hasnt got the front propshaft as it has collapsed...but it still drives even without the diff lock engaged..........with a free wheeling (none LSD) diff this would not happen as it would spin all the power away through the front prop flange as its the easiest for the engine to turn.