i put on a new drive belt about a month ago and after a while it started to screech for a second when i turn on the engine. then after a few more days it would loosen up and screech very loud while driving in any gear and still screech but not as loud while just idling. every time I tighten the belt it would loosen up in a few days and start to screech again. I got a new drive belt, put that one on, three days later struck by the terrible screech while driving. I tightened the new one and has lasted one day so far but i think it will happen again.