The front diff is very easy to separate from the housing. Once you have the housing out on the ground (and the long shaft removed from inside the housing), rotate the housing so the pinion is pointing straight up, step on the long side of the housing and pull the pinion end of the third towards the short axle side.....it should pop loose. If that method doesn't work, then once you have the pinion pointing straight up, raise the long side up off the ground a little bit and while holding on tight to the pinion flange, either stomp down on the long end of the housing or smack it with a hammer.....it usually doesn't take much to break the third loose from the housing.