Our 2015 ACE 30.1 had handling problems also and I started with cheap and easy. Alignment was first followed by weighing front and rear axels and adjusting air pressure. These two things did help but not where I wanted to be. The CHF front and rear came next and this made a huge improvement in the way it handles. I think a rear track bar would also be an improvement in semi-truck push on the interstate. Still something I might add in the future but after the CHF not nearly as necessary in my mind.
To OP your ACE should be set up the same as ours which has front and rear sway bars and a front track bar. One other thing is to check the rear sway bar brackets that attach to the rear axle. There have been a lot of reports of the bolts being loose or the brackets broken. These bolts should be torqued to 66 ft/lbs and it is a good idea to put blue locktite on the bolts. When I got under the MH to look at the sway bar in preparation for the CHF I found the street side bracket loose and the driver side broken. Ford took care of the bracket under warranty so that was no problem but that would have meant virtually no sway control on the rear. For some reason it only seems to happen on the rear and application of the blue locktite and proper torque should fix it forever. Jim.
