A squeak has developed in my 55' rear springs and it is driving me nuts. The best I can tell is that it is coming from my right rear spring. Is there anything I can do to stop this from occurring? I have tried to shoot some lube between each of the springs but it has only gotten louder. The springs have new bushings so I don't think this is where the squeaking is coming from. What do you guys think? Do I need to purchase new springs?