Kenworth adds enhanced 12-speed automated transmission

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

Paccar TX-12 PRO automated transmission Paccar’s TX-12 PRO automated transmission. (Photo: Kenworth)

The transmission is available with select Kenworth Class 8 models, including the T680 and T880 equipped with the Paccar MX-11 or PX-9 engines. It will also be available for the company’s Class 6-8 medium-duty models, including the T280, T380, and T480 equipped with the PX-9 engine later this year.

The TX-12 PRO is engineered to operate with MX-11 and PX-9 engine ratings up to 445 hp, 1,700 lb.-ft. of torque and 70,000 lb. of gross combination vehicle weight (GCVW). It includes many of the TX-18 PRO’s capabilities for vocational and select off-highway applications, Kenworth said, including the Extreme Duty clutch for improved low-speed maneuvering, Rock Free mode to help trucks get unstruck in mud or sand and an off-highway calibration tuned for changing soil conditions.

Other features include:

  • A 12-speed gear set offering a wide ratio coverage and allowing for enhanced maneuverability around jobsites.
  • Dual PTO openings, including a bottom mount 8-bolt and 4-bolt rear mount for a combined 95-hp capacity.
  • Internal oil temperature sensor to show transmission temperatures and notifications on the in-cab 15-in. digital display.
  • Standard column-mounted, right-hand shifter that places gear selection and engine brake controls at the driver’s fingertips.
  • Oil maintenance intervals of 250,000 miles, plus a maintenance-free clutch.

“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,” said 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.”

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