I would agree you have a bad bearing in the mix.....and both my stock pullies come off pretty well....no pounding or puller needed....my code 3's were left in the fridge overnight before install...makes for sliding on and off a lot better when shimming...I am running 0 shims right now, but I inspect them before playing everytime...and am thinking of adding a shim back in...but all is fine, so I may not touch them....good luck...