1996 Chevrolet S10 Q&A

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

there is a loud howling and clicking noise coming from under my truck while driving -
Answer 1
4x4, manual or auto. trans.?? While you are at it, Blazer or pickup and if pickup truck what engine? -
Answer 2
agree need more info -