My metro 36 w/ECS pulls to the right and will not hardly make a left turn unless I really help push it. Is this a worn belt or stretched belt? I can take it to my dealer, but thought I would check here first, because I am assuming its just a belt, that I can adjust or replace. The left drive belt seems a little looser than the right, so maybe its slipping. I have checked tire pressure, but this is too much of problem just for correct tire pressure. The belts are free of debris and clean. Thanks.