I have replaced power steering pump,belt tensioner with pulley, idler pulley,alternator, put on 6 belts and new harmonic balancer! took it to so many mechanic and still i have this squeaking sound like birds it is in the pulley and belt area . some times it will stop but will come back upon a hard acceleration and wont go away,has been doing this off and on for 2 yrs. and i hear other dodge caravans with same problem !!!!!!!! please help me. thank u