I installed a 6in superlift on my blazer and now the u-joint is binding slightly. I get a very slight vibration when starting from a stop. I put it up on the hoist at work while it was in gear and there is a good vibration. Im looking to get some axle shims to help with the drive shaft angle. Does anyone know a good place to get them and what angle should i get. I dont want to change the angle a whole lot. Just enough to keep it from binding.