I replaced my shocks approx 6 months ago and have had no problems. Now out of the blue I am getting a loud clunking noise going over even the smallest bumps and I am at a loss. I think the noise is coming from the front. Its an 89 Pioneer long bed 4x4 etc. I have Monroe SensaTrac shocks all around. Any ideas on how to stop the noise. I have ehard about some lithium greese or something you can spray on them, but I don't know! Thanks!