F350 Dually, anyone upgrade to F450 springs?
The rear springs are pretty saggy on my F350. 2005 Dually. It's used with 125k miles on it, must have had a good life towing a 5th wheel. It has a rear driveline vibration because of it. I'm going...
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not a direct answer, but I have a 2016 GMC 3500 Dually. I started with air bags and upper and lower stabiloads. Result was a bouncy house. Rancho 9000s sort of helped but ... Then I had a local spring shop add leaves to the rear and remove the airbags ... yes, the daily driver does ride a bit firmly, but it doesn't sag and the bounce is significantly reduced.
