Try to narrow it down a little more. Like said, prob not your U joints based on your description. It could be just a little lifter noise which mine has had for the last 30k miles, and it runs like a top. Open the hood and try to see if its coming from eng, etc... Have someone ride with you and try to isolate where its coming from. Just need a little more info to help ya out.
Originally Posted by Mymmars
when your start to anthropomorphise your jeep into somthing above a dog and below a hooker