As I was doing a visual on my CJ I noticed the rotor had grooves. Just though a brake job would do. Turns out a wheel bearing was trashed. Ended up putting $400 into rotors, bearings, hub, brakes within a week. Drive it and make sure it shifts into all gears, take it off road and test the hubs and transfer case. Crawl under and look for leaks. Don't be surprised to find the T-case and transmission, but look at the brakes, brake lines. Good luck