I had a clicking sound that I myself never heard, my neighbor pointed it out to me, that turned out to be bad u-joints on the front axle. Crawl under the front end and grab and see if you can move the u-joints up and down as well as side to side and see what you find. If they are bad replace soon, don't wait for a failure.
2004 Jeep Wrangler Rubicon
Member of the Gear Grinders 4WD Club