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. The Paccar TX-12 PRO builds upon the existing Paccar TX-12 transmission, which was designed to be one of the most efficient on-highway automated transmissions.
The new transmission is available with select Kenworth Class 8 models, including the T680 and T880 equipped with the Paccar MX-11 or Paccar PX-9 engines. The transmission will be available for Kenworth Classes 6-8 medium-duty models, including the T280, T380, and T480 equipped with the Paccar PX-9 engine, later this year. The TX-12 PRO is optimally engineered to operate with all MX-11 and PX-9 engine ratings—up to 445 hp, 1,700 ft.-lb. of torque, and 70,000 lbs. of gross combination vehicle weight.
The Paccar TX-12 PRO features many of the TX-18 PRO’s capabilities for vocational and select off-highway applications, including Paccar’s extreme-duty clutch for improved low-speed maneuvering, rock-free mode to help trucks get unstuck in mud or sand, an off-highway calibration tuned for changing soil conditions, and more. The 12-speed gear set provides wide ratio coverage, allowing for enhanced maneuverability around job sites.
“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 VP. “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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The TX-12 PRO offers dual PTO openings—a bottom mount 8-bolt and 4-bolt rear mount for a combined 95 hp capacity.
The transmission is equipped with an internal oil temperature sensor. The sensor shows transmission temperatures on the in-cab 15-in. digital display and provides driver notifications in situations causing excessive temperatures.
As with all Paccar TX-12 and TX-18 transmission models, the TX-12 PRO is standard with Kenworth’s driver-friendly column-mounted, right-hand shifter. The shifter places gear selection and engine brake controls at the driver’s fingertips for enhanced ergonomics, comfort, and overall performance.
Oil maintenance intervals for the TX-12 PRO are 250,000 miles, and the clutch is maintenance-free.
The TX-12 PRO joins Kenworth’s Paccar transmissions lineup, which includes the Paccar TX-12 automated transmission for fuel-efficient, on-highway applications; TX-18 and TX-18 PRO automated transmissions for high performance on-highway and off-highway applications; and the Paccar TX-8 automatic transmission standard on Kenworth’s medium-duty models. The Paccar TX-12 and TX-12 PRO will be available for Kenworth Class 6-8 medium-duty models equipped with the Paccar PX-9 engine later this year.