My 90 Camaro IROC sounds like something is catching on the back left wheel. It sounds like something is rubbing up against the tire but only when I am going slow after about 25 miles. It sounds as if it gets caught by something for just a split second and then will make a thud sound. Does anybody know what could possibly be wrong with it.

 

Hmm... This would be easier to diognose if it was on the front (disk). But you are dealing with drum brakes on this one. I would recomend starting small... Take the tire off of the side in question, then take off the drum so the shoes and hardware are expossed, then shoot them with some air from a compressor. After that visualy check the shoes and hardware for any damage. Take it from there bro. Sorry for the bad spelling.