2012 Ford 350, This truck has been taken care of and worked hard, lots of 10-12,000 trailer towing, its used in our for our business. With 90,000 miles the original Ranch 5000 had played their part, the truck was starting to sway and and get the (death wobble) effect especially at higher speeds and no-load on the truck. Decided to try the RS7000 and add a new stearing stabilizer. COULD NOT BE HAPPIER, the ride is a little stiffer, but smooth stiff if that makes sence. Very happy with the purchase.