12 screws to remove the front and back bumper guards and you will have easy access to pull out the diffs. It was my first time, and looking at the book scared the heck out of me. But doing one I was thinking WOW this is super easy. Are you going to leave grease in the diffs or going with silicon? If you go silicon a decent weight is 30k front and back. Dont forget to get new rubber gaskets or you may have some leak problems. I bought them off the mugen shelf. They have something like 12 in a pack. If you do silicon, make sure you also clean out all the grease. Nitro engine cleaner worked well and a bunch of paper towels for me....