[quote="gregster"]4wd drive can be used whenever it is slippy, and no damage to tf box will occur...
I have done 70mph plus in 4wd on slippy surfaces with no probs...
On an A with auto lockers, so long as you dont reverse up to unlock your hubs, 4wd to 2wd and vice versa can be done when moving with no probs...i usually just dip the clutch as I do it to ensure that there is no wheelspin which would mean wheelspeed difference front to rear...
With manual hubs on an A, you can merryily shift 2wd 4wd 2wd with no regard for unlocking the hubs...
4wd is the safest bet when on snow, slush, ice etc....just knock it back into 2wd if the road looks dry and free of slush, no need to stop and if it gets slippy again just push that stick forwards and get some 4wd again...
2wd is proper fun though,....sideways rocks!
If you need something done quickly just ask a busy woman then get the f"k out of her way.