The best advise I can think of, go to a suspension shop, I tried super springs from a camper sales (they wanted to sell what they stock not what is best) did not fix my problem, the suspension shop owner told me ambulances in his county tried super springs his opinion basicly was they were not a problem solver. he put extra springs on my truck I no longer needed air bags any of the common t/c items sold at their stores. This shop owner fixes tractor trailers everything and most of these people are experts in suspensions and suspension upgrades and fixes. Best thing I ever did for handling and over all performance without other upgrades, in the long run if I had went there first I would have saved a lot of money and had a better safer truck
