Yea this car has the dana 60 that the previous owner had built and installed. I did have some small vibrations that I'm hoping was caused by the pinion bearing being loose and preload not set right. I guess maybe when the gears were installed they didn't completly seat the bearing races allowing a way for the bearings to lossen up. So I had the rear end out to fix and thought I would check out the pinion angle when putting it back in.