I originally purchased my 3500 dually for pulling a 5th wheel trailer but subsequently switched to an Airstream travel trailer. The tongue weight on the Airstream, loaded, is only about 1,000 lbs. Even with other gear that I'll be carrying in the bed, the rear end of the 3500 is still too high and I have far too much capacity. I love the dually - and the stability it offers for towing. What I would like to do is to modify the rear suspension to bring the truck level. Lowering shackles alone will bring the secondary springs into contact with the chassis bearings, stiffening the ride and beating up the Airstream (---as well as the wife and I!) Removing the secondary springs would appear to a relatively simple fix - perhaps requiring nothing more than new U-bolts? I searched for information to see if anyone else had done anything similar - but with no luck. Is there any difference between the primary spring set on a 2500 and that on a 3500? If not, the U-bolts from a 2500 would probably work. I would hope to keep the procedure "reversible." Your suggestion would be appreciated.Edited by: Cracker