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F150 to Super Duty

Whitey

Member
The ride on my Super Duty is harsh w/out trailer, I'm used to previous truck (F150)... I know it "A TRUCK".
I've played around with air pressure (50/55 psi), it was a great improvement, but still not in the F150 category.

What's next to try, without breaking the bank?
 

Chaseweston

Well-known member
When I had a Chevy 1500 and went to a F250, the difference between the IFS on the 1500 (F150 is IFS as well) to the SFA on the 250 was a drastic felt difference in ride quality beyond the stiffness of the rear leaf's. You might be perceiving some of this mechanical difference as well. Solid Axle responds way different than IFS.

Now we have a Chevy 3500 with IFS but with torsion arms that were another strange difference in behavior for me.

Regardless, you will be hard pressed to maintain GVWR of the 250 while also achieving unloaded ride quality of 150.
 

WE3ZS

Member
Have you compared your truck’s unloaded (daily use) axle weights against the tire manufacturers inflation and loads charts? You may still have a little adjustment room on those tire pressures depending on weights and which size tires.
 

Whitey

Member
Have you compared your truck’s unloaded (daily use) axle weights against the tire manufacturers inflation and loads charts? You may still have a little adjustment room on those tire pressures depending on weights and which size tires.
Yes, deflating 10 PSI made an improvement, I was afraid going lower would trigger TPS light.
I was just looking for a little more improvement.
Thanks
 

Chaseweston

Well-known member
FYI - You can get FORscan and adjust the TPS alarm parameters with the free software. Just need a FORscan compatible OBDlink and download the software on your computer. There are actually a lot of features you can adjust.
 

M and E

Well-known member
I can give you lots of options. Bilstein 4600 shocks on all four corners is an easy and inexpensive way to reduce some harshness. They provide modest ride improvement.

Sulastic shackles is another relatively inexpensive fix and provides a noticeable improvement but not on deep suspension strikes. I have them in addition to the Bilstein 4600s.

I’ve also added a Bilstein 5100 steering stabilizer. Huge improvement in front end control in all conditions but doesn’t really improve ride. I can absolutely promise you that you’ll not regret upgrading the stabilizer on an F350. Cheap, 15 minute job, and dramatic improvement.

Your front anti sway bar, if you have one from Ford, is contributing to front harshness. A quality replacement will improve the front end feel. This is probably the best thing any of us Ford SD owners can do to improve front end road feel. I’m still looking into which one is best and am considering another option I’ll share later in the response here. Easy DIY by the way.

Progressive coil springs up front are not terribly expensive but will improve ride quality.

Progressive leaf springs are anywhere from 600 to 2k dollars. But, they’ll improve your ride significantly. Have to watch your load ratings though.

You can also look at mini-packs. They usually replace overload springs and are essentially progressive emulators. They work but not as dramatically as progressive packs.

I may be going with this option below in 2026 if I get a windfall I’m expecting. But it’s 10 grand. I won’t lift it at all.


Icon Vehicle Dynamics is another great company. You can talk to them about options. They’ll set you up with a great kit but it will more expensive than just the Bilstein option.

Finally, Carli Suspension is extremely popular but again pricey.

Lots of options. I’ll take whatever criticism folks have on how much I spend on suspension rebuilds!. It’s not for everyone but is my thing. I even have custom built suspension on the scooters and every motorcycle we have ever owned.
 

M and E

Well-known member
FYI - You can get FORscan and adjust the TPS alarm parameters with the free software. Just need a FORscan compatible OBDlink and download the software on your computer. There are actually a lot of features you can adjust.
Depends on the year. They’re still working on 24 and 25 model year updates over at Forscan. Not sure TPMS is one of the current functions available on my 24, for instance. Could be.
 

George

Well-known member
Within a month of buying my Ram 3500 I had a puncture. I noticed the sidewall was very low and wondered why the TPMS did not alarm — it displayed ~40psi but did not light a light nor sound an audible alarm. After fixing the flat I took it to my dealer. They eventually reported that a vehicle over 10,000 GVWR is not required by the gov't to have a warning so Stellantis doesn't do it on a 3500.
The good is that I can set my pressure to anything — the bad is that I have one extra gauge to monitor.
 
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