This may be very random, but with all the jeep educated memebers I thought I would ask. I have a 2008 JK X with a 3" teraflex lift and 35's. Recently when initially accelerating from a stop or after going in reverse and then forward I here a single pop/clank from coming from underneath near the rearend. Definately sound like something is moving/shifting and knocking when it does this but not sure what it is. I am going to get this looked at tomorrow but thought I would at least see if anyone had any clues.

 

Do you have a trackbar relocation bracket? Possible it is not tight enough.