Eaton 12-speed transmission standard on International on-highway trucks

Cannon Mug Headshot
Updated Jan 15, 2020

The Endurant 12-speed automated transmission, the first product from Eaton and Cummins’ joint venture, has been named standard equipment on International LT Series, RH Series, and LoneStar heavy-duty trucks.

Made available on International LoneStar and LT trucks spec’d with Cummins’ X15 engine in May last year, Tuesday’s announcement adds coverage for International’s A26 engine along with the regional RH tractor.

The first “purpose built” heavy-duty automated transmission on the market when it debuted in 2017, Endurant features torque ratings of up to 1,850 lb.-ft.

Automated manual transmissions (AMT) are bred from a manual gearbox. Even though the process of shifting is automated, the shift pattern isn’t changed. With a true automated transmission like the Endurant, Eaton’s Manager of Program Management Matt Erdmann told CCJ during a test drive ahead of Endurant’s debut in 2017, says many conventional design restraints were removed. For example, Endurant features linear shift rails – a departure from the standard sideways shift pattern required of manual transmissions and AMTs. Linear shift rails also help optimize the design for speed and reliability since there’s no wasted sideways motion.

Jason Cannon has written about trucking and transportation for more than a decade and serves as Chief Editor of Commercial Carrier Journal. A Class A CDL holder, Jason is a graduate of the Porsche Sport Driving School, an honorary Duckmaster at The Peabody in Memphis, Tennessee, and a purple belt in Brazilian jiu jitsu. Reach him at [email protected].