Kenworth introduces new transmission at Work Truck Week

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Updated Mar 13, 2024
The new PACCAR TX-12 automated transmission will be available for Kenworth medium-duty and light heavy-duty applications..

Kenworth introduced the new Paccar TX-12 PRO automated transmission for Class 6-7 and light Class 8 vocational applications Tuesday at Work Truck Week 2024 in Indianapolis. 

[RELATED: Kenworth's Chillicothe plant celebrates 50 years in operation]

The TX-12 PRO builds on the existing TX-12 transmission, the company says. It's available with select Kenworth Class 8 models, including the T680 and T880 with the MX-11 or PX-9 engines. The transmission is will also available later this year on Kenworth Class 6-8 models, including the T280, T380 and T480 with the PX-9 engine. The new transmission is engineered to operate with all MX-11 and PX-9 engine ratings, up to 445 horsepower, 1,700 lb.-ft. of torque and 70,000 pounds of gross combination vehicle weight. 

"The new TX-12 PRO transmission is a welcomed addition to the Paccar transmission family and will be an excellent powertrain component for our vocational medium duty customers and customers operating Class 8 trucks that are in light vocational applications which don't require the power of the TX-18 PRO," says Jim Walenczak, Kenworth general manager and Paccar vice president. "The TX-12 PRO builds off the proven technology of the TX-12 and TX-18 PRO to be an efficient and durable product for on- and off-highway applications." 

The TX-12 PRO has dual PTO openings: A bottom mount eight-bolt and a four-bolt rear mount for a combined 95 horsepower capacity. The transmission also has an internal oil temperature sensor that shows transmission temperatures on the in-cab 15-inch digital display and provides driver notifications in situations that cause excessive temperatures. It comes standard with Kenworth's column-mounted, right-hand shifter. 

Oil maintenance intervals are 250,000 miles and the clutch is maintenance-free, the company says. 

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