There's a reason every other class 8 truck on the road is a Freight shaker. Built to a price point. KW and Peterbilt are head and shoulders above Freightliner in quality, ride, and fit and finish. Never cared for Mack but they did build tough trucks for construction, off road applications. I drove a new rental Navistar a few years ago that was as bad as the Freightliner. When I retired 2 years ago the company had started buying Volvo's which IMHO were much better than Freightliner, but not as well built as the Paccar trucks. The old Cat engines were IMO the best heavy truck engines ever built.