From what I have taken, it is not actaully that hard. The hardest part I think is setting up the back lash correct? I have taken out my center section to rebuild the trac lock before, so really I dont have that much more to do to swap in some gears. All you gotta really do is check the back lash or whatver when you put them back in correct? If so, I might try to swap some gears in myself this spring.