Changing gears is not an easy task. Look at the OX locker install in the tech section to see how much effort is involved. Plus, you'll need at least $200 in special tools that you probably don't already have. That being said, I have never set up gears, but am planning on taking the plunge on my first set early next year. I have rebuild carbs, my NP435, installed front and rear axles, and rebuilt the top half of my engine, so I am confident in my mechanical abilities to set up the gears. If you are uncomfortable doing things like brake work and tranny swaps, re-gearing is probably something you'll want a shop to do for you.