Kenworth is expanding the availability of the Paccar TX-12 Pro automated transmission to several models within the company’s medium-duty line. Ranging from Class 7 to light Class 8, the vocational transmission is available on the Kenworth T380 and T480 when matched with the Paccar PX-9 engine. 

“Versatility and durability are what the Kenworth T380 and T480 are all about,” said Kevin Haygood, Kenworth’s assistant general manager for sales and marketing. “For customers who prefer an AMT (automated manual transmission) over an automatic option, the TX-12 Pro is the solution. It gives customers great performance and toughness when they use the T380 or T480 in demanding vocational applications.”

Specs for the Paccar PX-9 Engine

The Paccar PX-9, with one of the highest power-to-weight ratios in the industry, can be spec’d with peak horsepower ranging between 260 and 380 for on-highway and vocational use and up to 450 horsepower with 1,250 lb.-ft. of torque for fire service vehicles.

Features and Capabilities of the Paccar TX-12 Pro

The Paccar TX-12 Pro was designed for rugged service and low-end drive performance applications, such as dump trucks, snowplows, and chassis-mounted tankers.

The TX-12 Pro features an Extreme Duty clutch for low-speed maneuvering, and Rock Free mode to help trucks get unstuck in mud or sand. Plus, it has an off-highway calibration tuned for changing soil conditions. The 12-speed gear set provides wide ratio coverage, allowing for excellent maneuverability without sacrificing fuel economy at highway speeds. 

For applications requiring a power take-off (PTO), the TX-12 Pro has dual openings—a bottom-mount 8-bolt and 4-bolt rear mount—for a combined 95-horsepower capacity.

The transmission and clutch are both equipped with internal oil temperature sensors to monitor performance and ensure long life. Their temperatures can be displayed on the in-cab 7-inch digital display and can provide driver notifications in situations causing excessive temperatures. 

Oil maintenance intervals for the TX-12 Pro are 250,000 miles, and the clutch is maintenance-free.