The sammy case,the neutral position is a 4wd position. When in neutral, both the drivelines are locked together. With this setup, the bearings don't have proper lubrication. When you put the 2lo mod in the case, you end up with a "TRUE NEUTRAL" position, it makes the case last a lot longer when you flat tow. Also makes the steering effort a lot less when you have a front locker and need low range on a corner on the trail, but don't need the front wheels pulling you around the corner.