Long story short, I regeared it a few years ago with the help of a co-worker. This is when the vibe thing started. In an effort to find the vibes, I had a shop in Sacramento replace everything inside the rear axle and re-re-gear it. When I picked it up it was a howling monkey, so I took it back to them to re-re-re do it. And now, a year later, I have the howling monkey again. Verified it was the rear, and now I get to possibly do it again, so I'm not taking to another shop. I can screw it up just as good as the next guy!Case spreader? Are you finally going to tackle the gears yourself?
I actually have a good tech at work with experience, and a few local jeep friends who can help me out. In the shop's defense, I could have possibly starved the pinion bearing when I was messing with pinion angles to try and dial out the vibes, but I doubt that's it. Anything's possible, I guess.