I'm such a noob when it comes to ball-diffs and 2wd. I feel like my car runs pretty good but I'm getting a squeal now from my 22 4.0SR when I am in the upper rpms. So I assume that means that the ball diff is out of adjustment or going bad? It took me a bit to feel like I had it set in the first place. I'm half tempted to rebuild with a gear diff, even though the car primarily runs on low-bite dirt track. It can be frustrating.