The Eaton Cummins Automated Transmission Technologies joint venture has added a new downsped overdrive model to its SmartAdvantage powertrain line, which combines Cummins’ X15 engine with Eaton’s Fuller Advantage automated manual transmission. The 1,550/1,850 lb.-ft. torque rating is compatible with rear axle ratings down to 2.47:1, enabling engine cruise speeds as low as 1,075 RPMs—lower than some direct drive transmissions. The new model will be able through OEMs in October.

“This new SmartAdvantage model is capable of the lowest cruise RPMs in the trucking industry for best in class downspeeding,” said Alex Stucky, product strategy manager of heavy-duty linehaul transmissions with Eaton Cummins Automated Transmission Technologies. “It’s our most downsped SmartAdvantage Powertrain, and it has been validated in field tests across a wide range of duty cycles. When paired with the 1850 rating, fleets can maximize fuel economy without sacrificing performance.”