Jouncing on I-10 Concrete?

[astrungis]

Can anyone tell me what causes my truck and Montana to "jounce"? We were traveling eastbound on I-10 in LA. The highway is concrete with expansion joints every 10 feet. The joints are slightly depressed so that as all four axles go over the joint, it causes both vehicles to gallop up and down or "jounce". I have air bags on the truck set at 55 lbs. In addition, I have Torklift "Stable Loads" that are rubber blocks that employ the upper leaf springs under heavy loads. My wife is on me about the ride. What do you guys do? Is this what I can expect on this type of road? My Chevy truck rear-end seems to be higher than the front of the bed with no load on it. Is it causing the Montana to be towed at a slight upward angle and causing the jounce? Thanks for your replies in advance.