Kenworth Expands Paccar TX-12 Pro Automated Transmission Availability for Paccar MX-13 Engines
Kenworth’s T680, T880, and W990 are now available with the Paccar TX-12 Pro automated transmission and the Paccar MX-13 engine.

The T880S is one of three Kenworth models that can now be equipped with the Paccar TX-12 Pro automated transmission. It is also available for the T680 and the W990.
Photo: Kenworth
The Paccar TX-12 Pro automated transmission is now available with the Paccar MX-13 engine for Kenworth’s T680, T880, and W990. It is designed to optimize performance for both on- and off-highway applications such as dumps, plows, tankers, and more.
The TX-12 Pro builds upon the standard TX-12, one of the most efficient on-highway automated transmissions.
“The TX-12 Pro transmission’s integration with the MX-13 engine is a welcomed addition for our Class 8 customers that operate in vocational applications,” said Kevin Haygood, Kenworth’s assistant general manager for sales and marketing.
The TX-12 Pro is optimally engineered to operate with all MX-11 and PX-9 engine ratings – up to 445 hp, 1,700 lb.-ft. of torque, MX-13 engine ratings up to 455 horsepower and 1,650 lb.-ft. of torque, and 70,000 pounds of gross combination vehicle weight (GCVW).
The Paccar TX-12 Pro features many of the TX-18 Pro enhanced 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 what Kenworth called excellent maneuverability around job sites.

Kenworth has expanded the availability of the Paccar TX-12 Pro Automated Transmission for Paccar MX-13 engines.
Photo: Kenworth/Work Truck
The TX-12 Pro offers dual PTO openings – a bottom mount 8-bolt and 4-bolt rear mount for a combined 95-horsepower capacity.
The transmission is equipped with an internal oil temperature sensor. The sensor shows transmission temperatures on the in-cab 15-inch 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 stalk 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.
More Vehicle Research

Electrification Incentives: The Acquisition Windfall Fleets Can't Miss
Discover how fleets can use tax credits, grants, rebates, and vouchers to dramatically reduce electric truck and charging infrastructure costs—before today’s funding disappears.
Read More →
Top 50 Executive Fleets
It is that time of year again! Time for the 2026 list of the Top 50 Executive Fleets, presented by Automotive Fleet and Volvo as part of its annual Fleet 500. Download now to see this year's list of companies!
Read More →
Back at Star Nation for a Closer Look at Western Star Trucks and the People Behind Them
Work Truck returned to Western Star’s Star Nation Experience for another hands-on look at the trucks, technology, and operator community behind the brand.
Read More →The Top 300 Commercial Fleets
The Top 300 Commercial Fleets: See the List
Read More →
Mack Defense Receives Additional Order for 115 Heavy Dump Trucks Under U.S. Army’s M917A3 Program
The latest order of 115 Heavy Dump Trucks (HDTs) from Mack Defense for the National Guard is part of the $47-million order from the U.S. Army approved in the 2026 National Defense Appropriations Act.
Read More →
Rizon Introduces Service Combo Body, Increases Electric Truck Applications
Rizon now offers a combo service body that combines lockable storage and a spacious cargo bed in a single zero-emission vehicle. The body supports unique options including cranes, ladder racks, generators, lift gates, and work lighting for a wide range of vocational applications.
Read More →
MFTBC Establishes FUSO Academy Dubai Training Center to Strengthen Network Capabilities in Middle East & Africa
Mitsubishi Fuso Truck and Bus Corporation’s new FUSO Academy Dubai Training Center will support technical and non-technical capability development. It features enhanced training infrastructure to improve service quality, uptime, and readiness for advanced vehicle technologies.
Read More →
Paccar Updates MX-11 and MX-13 Engine Software to Enhance Customer Operations
Kenworth Truck Company and Peterbilt Motors Company will update software for vehicles equipped with Paccar MX-11 and Paccar MX-13 engines to ensure they comply with EPA guidance on diesel exhaust fluid inducements.
Read More →
GM #1 in U.S. Sales for the Second Quarter of 2026
General Motors said it was America’s #1 automaker in U.S. sales for the second quarter of 2026 with total sales of 714,896 vehicles, down 4.2%. GM led in full-size pickup and large SUV sales and reported growth in fleet sales.
Read More →


