Eaton Cummins Automated Transmission Technologies recently released specifications for its new Endurant XD series and announced it will include Endurant XD and Endurant XD Pro models. 

The Endurant XD series are purpose-built, high-performance automated transmissions designed for on-highway applications with high gross combined weight ratings, such as double and triple trailer trucks, and severe-duty on/off highway applications like dump and logging trucks. 

“Purpose-built means designed from the ground up—from the gear architecture to the shifting to the actuation. It is all meant to be an automated transmission. There’s no manual version, it’s not human shiftable,” said Ken Rocker, Endurant XD series product manager, Eaton Cummins Automated Transmission Technologies. “This opens up changes to improve the shift qualities as well as the introduction of a new ratio gearset.” 

The Endurant XD series features a twin-countershaft design with helical gearing and large bearings optimized for higher engine torque. A new 18D ratio set with 20.5:1 overall ratio with small, even steps ensure smooth shifts and performance benefits in all driving conditions. It is packaged in a clean, contained design with internal wiring and sensors to minimize exposure and corrosion for improved reliability. Overall, its design is 225 pounds lighter than comparable UltraShift PLUS models.

“One of the major differences between this gearbox set—a three by three by two architecture—is that there’s one less gear layer in this transmission compared to the legacy 18-speed models. There are less gears in this transmission, but we still achieve 18-speeds,” Rocker said. “Some of the weight savings came from fewer components and a large savings came from the all-aluminum enclosures as opposed to cast iron. We’ve also gone from a twin-plate clutch to a single-plate clutch, so additional weight was removed.” 

 

(Read the entire expanded product news article in the PTE March 2022 issue)