F350 Dually, anyone upgrade to F450 springs?

[pcoplin]

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 to be buying new rear springs, the spring shop says they have a set of rear springs that are rated at 4500 lbs each, versus the stockers at around 3500 each. Should give around a 1 inch lift in the rear.

Anyone upgrade the rear springs on their Ford? Thanks for any experience.

[Lwiddis]

Air bags don’t increase load capacity. They level the truck.

[pcoplin]

I do already have upper and lower Stableloads. It's rides fine unloaded, but I don't mind a rough ride when unloaded, I only drive it to haul stuff, and most of it's miles are loaded with the camper and towing a Jeep on a trailer.

[pcoplin]

PNW_Steve wrote:
I have not seen the 450/350 spring swap but I have seen a number of folks add airbags on the rear to increase load capacity and improve the ride.

I don't think that I would want stiffer springs in my 3500. While it does ride reasonably when loaded. Empty, it rides like a buckboard and it is also my daily driver. I hope your Ford rides better 🙂

Are you talking about the truck in your sig that has 22.5s? 😄 Likely not your springs that rides harsh?

[tlowe43q]

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.

[PNW_Steve]

I have not seen the 450/350 spring swap but I have seen a number of folks add airbags on the rear to increase load capacity and improve the ride.

I don't think that I would want stiffer springs in my 3500. While it does ride reasonably when loaded. Empty, it rides like a buckboard and it is also my daily driver. I hope your Ford rides better 🙂