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

by in Clearlake, CA on June 27, 2013
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2 answers
ANSWER by , June 28, 2013
4x4, manual or auto. trans.?? While you are at it, Blazer or pickup and if pickup truck what engine?
ANSWER by , June 28, 2013
agree need more info