I would like some help determining the cause of the noise coming from the rear of my X (06 OR, AT). Last Sunday, we took it serious off-roading for the first time, and afterwards I noticed the noise. Almost every time I turn, the rear will make a clunking noise (several clunks in a row per turn). I went under the truck last night and could not see anything out of the ordinary. I have no mods on my X. Thank you for any input.