Road.
Force.
Balance.
My brand spanking new KO2’s on Motegi trail lite wheels did the same thing after getting them installed at the local stealership. Took her to the local discount tire and had them lifetime r/f balanced. 98% of the shake is gone. I have 6 wheels in rotation and even though they were fine when I took them off, each time I’ve rotated I’ve had to go back to discount tire to get them rebalanced and it’s been better.
If you look at the factory wheels when they come from Ford, they are usually balanced perfectly, but, will have a LOT of weights on them. One of my OEM bead lock wheels has 22 ounces of weights. I’ve not been able to convince Discount tire to go that far, they’re very hesitant to add that much weight.
Even if the wheels and tires are perfect, now you have a stable platform of troubleshooting to build on.
What exactly did they do? put eyes on everything and look for damage? You won’t find an out of spec component like that.
- move tires on one side back to front, reassess; repeat for the other side.
- are the wheels out of round?
- how old are the shocks and have they been rebuilt? They’re about due, maybe 10k more if you’ve babied the truck
- has the truck ever been in a collision?
- any hard hits off road?
- consistent in 2h, 4a & 4h ?
I’d posit that if the road force balance improves or vastly improves things, that is probably your problem. If it doesn’t change anything, you might to as
@FordTechOne suggests and repeat. If you get an improvement, again you’re probably on to the fix but if it doesn’t help at all, you’ve got some kind of suspension or driveline issue going on.
HTH
