@Julien Recanand I had a brief chat about using rear diff lock engaged in the sand full time.
I've been using this recently and have seen some notes that Jeep sand runner has the same functionality when in desert offroad mode (up to 100kph)
What's the pros and cons of this?
I note that this mode (on my vehicle at least) requires center diff engaged as well for 4WD (or just 2H), which is the default in sand mode.
I did half my drive on Saturday in 4H + rear and centre locked, then half in 4A (unlocked centre and rear diff).
Could not perceive any difference to my driving experience in the large dunes in nahel.
Added page from manual from reference for locks and modes etc.
@ZedI'm sure you have some opinions on it?