2008 Wrangler X w/3.8 automatic. When its in high gear i give it the gas i hear what sounds like lifter or something. I have a Araid air system on the jeep. But sounds like maybe it could be a exhaust leak. Drives me crazy to hear it. Any body else have this problem. It only has 10,000 miles. Any ideas on how to check what this noise is. It runs great!!