i have an 01 ram with the 5.2 and when im in park its fine. but when im driving and i come to a stop i get this real high pitched noise.and it will also happen sometimes if im just idling or goin about 10 mph or under. its not the brakes i just had them replaced. and if i have been driving for awhile it usually wont do it. need some help i dont know much

 

and its kind of a random sound. no rythym to it

 

Check idler pulley, or tensioner.
also water pump going out will squeal.