A couple of guys on the trail walked next to me while I drove it and they believed the noise was coming from the t-case.LILRDJP said:Is it coming from the underside or the engine compartment. Have you had you Cam Position sensor adjusted. I had a very loud ticking untill I had a distrubuter sync done. Just a thought. Streesed rev's and the sensor off makes a racket under the hood.