My trem spring is tightened up pretty tight and I don't have a problem. All I can recommend without having it in my hand is..
-Make sure the tremlock is pushed towards the neck
-Pull the actual tailpiece part UP when stringing and tuning the guitar back up (sometimes it can get stuck in the wrong position)
-Put the washer back on the trem arm collar thing, and tighten the hexagonal nut up with a socket wrench/pliers as hard as you psychically can.
If the trem arm isn't swingly freely, those 4 little tab bits need a very slight bending out. Try and make it so the they're all evenly bend out, if you get me.
