I had a friend of mine from Tennessee come to visit in his Jeep JK, while he was here I took him out on Rampart to show him around. What was weird was the way the washboards affected the Jeep's rear suspension........his Jeep would hop so bad it would get sideways, most of the time to an almost uncontrollable level, At what I thought were slow speeds. Don't know if it is because they are so light or if the coil springs were to "springy". Either way it was making me nervous.
Maybe this kid was moving too fast???