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The Detroit Diesel Detroit DT12 combines the operational ease of an automatic with the efficiency of a manual transmission, resulting in enhanced fuel economy, vehicle performance and safety. Available in the Freightliner Cascadia, the DT12 maximizes fuel efficiency for line-haul/long haul operations. Adding to the transmission’s overall economy is its lightweight design, which offers additional payload because of its aluminum housing and single counter shaft. The DT12 improves slow-speed maneuvering capabilities without compromising high road speed efficiency. The 12-speed, direct- or over-drive automated manual transmission combines a traditional manual gearbox with high-speed, computer-controlled shift and clutch actuators that automatically and seamlessly select the right shift pattern and perfect clutch engagement for fuel economy and engine power.