The Detroit DT12 12-speed automated manual transmission is the most common, designed to reduce driver fatigue and optimize shift points for fuel savings.
Evolution of the model since 2007 has led to over a 35% improvement in fuel economy through aerodynamic refinements and engine tech. Key Buying Considerations buy freightliner cascadia
The Detroit DD15 (400–505 HP) is the industry standard for its balance of power and fuel efficiency. The lighter DD13 is often found in day cabs or weight-sensitive applications. The Detroit DT12 12-speed automated manual transmission is
The Cascadia is designed for versatility across three primary cab configurations: The lighter DD13 is often found in day
The is the best-selling Class 8 semi-truck in North America, favored by owner-operators and large fleets for its superior fuel economy and low cost of ownership. Whether you are looking for a brand-new 2026 model or a reliable used workhorse, buying a Cascadia requires understanding its generations, powertrain options, and configurations. Available Models and Configurations