Hi,
i have just purchased a used 2016 F250 with 36k miles. I am having issues with how the truck behaves both in town and on highways.
It seems to be affected by the smallest amount of road crown and tries to pull to the side. If it's in the right lane it will pull right and to the left when in the left lane. It is much more pronounced in the right lane. Streets in my area are also crowned and this pull happens at residential speeds too.
When steering wheel is dead center the truck heads to the ditch of the crowned side.
Also, steering wheel doesn't want to return to center after a turn as quickly as one would expect.
I have double checked tire pressures with 2 different handheld gauges and the truck is 100% stock.

These are the current alignment figures:
Front
Caster left 2.86 right 2.96
Camber left -0.04 right 0.32
Toe left -0.01 right 0.14 total 0.13
Rear
Camber left 0.00 right -0.06
Toe left 0.13 right -0.13 total 0.00
Thrust angle -0.13
SAI left 12.40 right 12.09
Included angle left 12.36 right 12.41
Setback front -0.12" rear -0.71
Track width diff 1.54"
Wheel base diff 0.59"

Any suggestions for better highway stability and correct off center steering wheel and pull in the right lane? Alignment shops in my area tend to be pretty much useless and just make up excuses. All I got from the dealer was "the alignment is within spec".
Thanks

 

Need a few more bits of information on your truck:

RWD or 4WD?
Any special packages? Snow Plow, Heavy Duty, Camper?
Tire/Wheel size?

Any add-ons? Lift blocks? Shocks? Sway bars? You say it 100% stock-but?

 

 

Well, your numbers are within published specs. Right caster and camber is a little (tiny) on the high side-but still well within spec.

What pressures are you using in your tires?

The fact that you are experiencing this in both a left and right event I doubt you have a lean-but you can measure it out of you want to-level surface, empty cab, measure from fender lip straight down to lower rim lip note all 4 measurements-side to side comparison should be less than 16mm (5/8"). It would also throw out brake drag as a contributor.

What did you drive before you got this rig?

 

65psi in all 4 wheels.
Had 2 Ram 1500s, a 2500 and a Nissan Armada in the last few years. The Rams didn't exhibit this behavior but the Armada did.
Does the F250 have an adjustable drag link or must I use front toe to compensate for steering wheel being off center?
Thanks

 

You are running your tires a little high for an unloaded truck-most will run in the high 40's/50's just to smooth things out a bit...

Now your steering wheel is off center?

One thing you can do to adjust for crown is to add some more positive camber to the left-about a 1/4 deg or so. Shouldn't have a major bearing on flat surfaces but will counteract the crown to the right.

 

I will try lowering tire pressure and see if it makes any difference.
Steering wheel is off center because all roads in my area are crowned, including municipal ones.
Thanks for the tips.