Hi, I had my 01 superduty F350 4X4, alignment done and my caster is 3.54 and 3.62.
I still have a small amount of return to center and small amount of wondering.
I can get 2) 1.75 adjustment sleeves that would put my caster at 5.29 and 5.37*.
Ford specs 1.50 - 5.50*.
From what I understand of alignments is more caster the better for my described drive ability? Any input on this would be appreciated, Artie

 

Those numbers are what I would want...closer to zero means more understeer and better even tire wear...closer to the high side means better tracking and more road feed back...Why change? Dummy move...Ford pickups were first in the industry to build lots of positive caster into their trucks, mostly because of the twin Ibeam. If you have some of those Hey Look at Me mods then your issues aren't with alignment numbers but your ride height.

 

Yes, go for it. I would if I was replacing the ball joints. Let me know how the steering feels afterwards.

 

I was hoping to hear from someone that has had the caster in the 5 - 5.5* range before I did. I have drove straight front axle trucks my whole life, this truck still feels squirrelly . This truck has no road feel, like a early 1960s GM Buick or Oldsmobile, too much power steering.
I want road feel, return to center, and tire life.
My truck is stock height with little to no sag.

 

I had the caster in that range on a 1979 F150 and loved it. Good to have more negative camber also. You have to work at it on solid front axle trucks.

 

Your problem is not the caster, leave it alone, it only comes into play when you are turning. When you are going straight camber and toe in are keeping it centered well on the road. When you make a turn caster comes into play and it's a combination of all 3 adjustments which "lays the wheel over" like on a motorcycle. Motorcycles have no camber or toe in and rely purely on caster for turning. Caster will do nothing for keeping the truck centered well on the road but will affect returning to center after a turn.