I have a 2001 grand caravan sport with 59k on it. I bought it used and it developed a clunking sound from the front end when going over anybumps at low speed. It gets louder when the tempature drops. My dealer heard the noise and was unable to locate the problem. They said that all the suspension components were tight and the van was safe to drive. But I have 3 kids and I am very concerened about this sound. It just doesn't sound good and I worry that something is going to give. Anybody experience this out there?