I have a 03 sonic blue cobra and i notice that when say expecially when crusing in town at like 30-35, if i put it into 4th and just cruise i can rear this rubbing/clunking sound coming from the rear? It has bald drag radials on it right now so maybe thats it otherwise anyone else hear of this, if i accelerate it goes away, if i just coast it still does it, even if i take it out of gear. But cruising on the highway at 60-70 i hear nothing. Any ideas?