Thinking about this a little more, it also could be that you need a different shim thickness. When the Code3 pulley was installed were the same shims installed that were on the stock pulley? As the newly installed pulley "seats in", the clutch may have started rubbing slightly when disengaged causing that squealing sound. Maybe another forum member can chime in on the likelyhood of problem being related to the shim thickness. The more I think about it I'm believing that could be your problem. If you have another shim ring you might try installing it to provide just a bit more shim thickness creating additional clearance between the clutch faces when the clutch is disengaged.