Well I give up, shimmed the rear up and down, both ways makes the vibration worse. Shimed the trans up, got worse. Balanced all 4 tires/wheels just in case. I can make it worse but can't make it go away. Odd thing is you can barely feel it when it's on jack stands. Tire and wheels made no difference. The vibration when on jack stands is barely noticeable no matter the changes made. I wondering if it's in the diff? It feels fine when your turn it? I did have the cover off when replacing the bearings and everything looked good.