Just did my first couple break-in runs on my 3.6 manual JLUR. These gears are perfect for me with the manual and 37” Trail Grapplers. First time doing my own gears but thanks to @chevymitchell and another helpful Facebook group it wasn’t that bad at all. Wife got me a press and a few other specialty tools for Christmas so I was able to do everything myself. If you’re used to doing your own wrenching and have a decent attention to detail I would be worried at all about tackling this yourself. Because the Jeep is an extra vehicle/toy I was able to take my time and do this over the course of a couple weeks. 2nd axle was definitely much faster than the first.