transmission windup

Yeah - I think it's all so subjective. You can be doing it on what appears to be a hard dirt road and be getting the slippage required every few metres to unwind it constantly. Other times, if conditions are different, maybe not.

I do run mine in 4Hi if the road is very slippery - i.e. after a downpour and I'm in a hurry. Otherwise - it's sometimes more fun to flick out the rear a bit (in a controlled manner of course)!!

I agree that shifting it into 4Hi is best option, even on "fast" dirt.
One advantage that people often forget about is the braking effect.......
In 2wd, if you have to hit the skids hard, there is a chance of locking up the back wheels as the weight is transferred to the front and the rears have less grip as a result. However, with it in 4Hi, when you hit the skids, the front and rear axles are "joined" and the rear wheels will be much less likely to lock-up as it would require the fronts to also lock-up. Sure that can still occur, just less likely as far as I'm concerned.
Of course the other advantage is that if you have to make any quick direction adjustments (wandering stock, roos, unseen potholes etc), you have inherently better control if the truck is already in 4x4.
Cheers
Roachie

Never thought of that Roachie. Makes sense to me particularly when you have to brake for an unseen dip etc and you strike some loose stuff.

Doesn't the triton have that great option to lock the centre diff or leave it open?

no centre diff...