Short answer; Yes, it is something you can do yourself, however, you MUST be very mechanically inclined, be able to follow and interprit mechanical drawings, have ALL the required tools, and most important have common sense. Close is NOT good enough here and "close" is exactly what seperates a BAD diff guy from a good mechanic. When you get to the point (and you will) that you are ready to say screw it, it's close enough. Take a break, go get something to eat, look at a few gear pattern pictures, and then take another crack at it. I promise you that you will get it better after you do that. I have been mechanicing my whole life and it still took me two days to do the rear because of the learning curve. Once I got it down and learned how to read the gear patterns then it took 5 hours to do the front. Take your time, do your research ahead of time, get ALL the required tools and knock it out. When you are done you must be within a few thousants of an inch..that is a very tight tolerance and means the difference between a ring gear failing, or lasting a very long time. You might even consider talking to your local Jeep dealer and finding their axle guy. He may be willing to look at the pictures of your gear patterns to verify your readings. Good luck, you can do it!