I got a 2000 3500 dually 2wd that i put a 2inch leveling kit in 15k miles ago I put air bags in 5k miles ago, I bought it from bobs big toys on ebay. Its killing my front end and the ride sux, ball joints are shot and my front end is makin really bad squeeking noises. I do alot of towing and if I put a heavy load on the back with the bags full it feels like the front end comes off the ground over rough bumps. Is there a difference in brands material they are polyerathane any help would be much appreciated. Thanks guys