a srange howling and clicking noise is coming from under my truck while driving on 1996 Chevrolet S10


there is a loud howling and clicking noise coming from under my truck while driving

Asked by for the 1996 Chevrolet S10
2 answers
4x4, manual or auto. trans.?? While you are at it, Blazer or pickup and if pickup truck what engine?
agree need more info