I've decided not to do a posi-lock to by pass the factory CAD system to get my 4wd to work and just to slide the collar over to permanently engage the front axle shaft. However I haven't been underneath there yet, just want to know exactly what to do once I get under there and what I'm looking for. Any help would be appreciated, I've been told its not too technical and really only need a jack, wrench, and some time.