All right, I know to drive 20 miles, park it and let it cool then drive 500 miles and change the gear oil, however i am talking about the front and i don't/can't drive for 50 miles in 4 wheel drive. so what is the process for the front break in?
I see nothing wrong with driving it around in front wheel drive (4x4 with rear d-shaft out) this is probably the best break-in method. i've done a lot of driving in FWD (usually when something in the rear is broken) and i can tell you one thing... it's easy to do burnouts!
a few other things i'd note, is that i think changing the gear oil after break-in is a bit of over-kill. personally, i don't even break in the front gears at all when i change 'em. i just go wheel it hard immediately afterwards.. not saying that it wouldn't be a good idea to break 'em in.. i'm just impatient.