Mine is similar to your ACE. First, what year is yours? The new V8 F53 chassis has larger OE sway bars the prior V10 years. Mine is 2019 purchased new. Steering wheel shook at highway speeds. Had to constantly correct steering to keep in lane. Steering wheel off center to right. Terrible body sway when being passed and cornering. I did the CHF which is basically tightening the sway bars. I did only front first. But after that made such a difference I did the rear as well. Then I took it to a truck shop. Had it aligned, steering wheel straightened, and front wheels balanced. I can now drive it for several hours at a time, one handed, without feeling like I’m fighting with it. Don’t worry with Thor. They’ll tell you the wheels were balanced when it left ( I checked. No wheel weights). They’ll tell you it was properly aligned (that’s BS). All told together it took me 2 hours of my time on CHF. And $200 at truck shop. Oh, and then I added a steering stabilizer. Another $300. Installed myself. Surely you can find a decent truck shop near you to do the work.
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