Just got my 4 new Rancho RS5000X shocks for my 99 TJ. They are for 0-2" lift. So of course I wanted to feel how theses things operate before installing them. After simply fully compressing them and letting them rebound freely I noticed that one of the rear shocks rebounds to full extension much quicker than the other rear and both front shocks. I am thinking it is a manufacturing defect. I cycled them many times to try to "equalize" the fluids/gasses. I mean brand new shocks should all rebound at about the same rate, wouldn't you think? I guess I will contact the seller and request a replacement. I ordered through our forum's Amazon store. Also, one of the boxes for the rear shocks was already open. I don't know if that is the "faulty" one or not.