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Explore the integrated Detroit™ Powertrain

The Detroit™ Powertrain provides integration like only Detroit can, because the engine, transmission, and axles are all engineered and designed to work together as one. With state-of-the-art component communication and one-stop parts and service support, no other powertrain does more to lower your Real Cost of Ownership℠.

The Detroit™ Powertrain integrates the most fuel efficient DD15® engine ever, with the technologically advanced DT12™ transmission and specifically designed Detroit™ tandem axles that put the power to the pavement.

The integrated Detroit™ Powertrain works to lower your Real Cost of Ownership, and is available in the Freightliner Cascadia® Evolution and the all-new Western Star® 5700XE. Come take a look inside.

The Most Fuel Efficient DD15® Engine Ever

With electronics calibrated to deliver greater horsepower and torque at lower RPMs, the flagship DD15® engine keeps your truck in top gear more often and cruises at a more efficient engine speed.

The lower engine speed in the DD15® reduces the number of fuel injections, dramatically improving fuel economy. A six-blade fan also reduces power draw without sacrificing cooling capabilities.

The DT12™ Transmission: State of the Art Communication

The DT12™ transmission links engine to axles, and communicates with the DD15® on an integrated electronics network to share damage-reducing information such as clutch overloading and driveline protection.

Tightly-spaced 12-speed gearing improves low-speed maneuverability, making the Detroit™ Powertrain not only strong and efficient, but smooth and safe to operate as well.

The DT12™ also features Intelligent Powertrain Management (IPM), which integrates terrain maps into engine and transmission functions to take efficient advantage of the truck's surroundings, not work against them.

The DT12's direct drive top gearing and eCoast are integrated with the downsped engine — which now idles at a lower 500RPM when off-throttle — for optimized fuel economy.

Detroit Axles: Performance, Power, and Fuel Economy

To provide optimum efficiency and performance, the Detroit™ Powertrain includes an all-new axle specifically designed to integrate with the downsped DD15® and DT12™, resulting in rock-solid reliability and durability.

The 6x4 and 4x2 configurations are available for applications requiring 4-wheel drive and superior traction, with a 2.41 ratio.

The 6x2 configuration boasts a 2.28 ratio, allowing the DD15® to turn fewer RPMs with the truck cruising at the same speed. It pairs perfectly with the low RPM torque curve and direct drive transmission. This means it can cruise in top gear longer, for better fuel efficiency.

The 6x2 axle configuration incorporates a non-driven tag axle on the tandem, reducing total weight (by 380 lbs.) and the number of moving parts, delivering better fuel economy.

Detroit Axles: Performance, Power, and Fuel Economy

Detroit™ steer axles offer rugged strength in a lightweight package, and integrate optimally with the other components. They are designed for the life of the axle, with multiple ratings available for tailored weight distribution.

The Detroit™ Powertrain's state-of-the-art steer axles provide a 55-degree wheel cut for remarkably nimble maneuvering. With needle bearings instead of bushings, they won't damage the king pins, and offer increased durability.

Only One Company Can Deliver This Level of integration

The Detroit™ Powertrain integrates state-of-the-art component communication and one-stop parts and service support like only Detroit can. No other powertrain does more to lower your Real Cost of Ownership℠.

Detroit™ Connect sets the new industry standard for integrating truck, driver, and business. And, every Detroit™ Powertrain comes with two years of Virtual Technician™ from Detroit™ Connect at no additional charge.

The Detroit™ Powertrain offers parts, service, and warranty — all from one single reliable source. With comprehensive warranty coverage for every component of the Detroit™ Powertrain, including a fast, hassle-free process, Detroit also delivers peace of mind.

With the most fuel efficient DD15®, our fastest-ever tandem axle, and our smooth-shifting DT12™, the Detroit™ Powertrain offers an unparalleled level of integration — with one manufacturer covering every component.