Kenworth Continues Expansion of PACCAR TX-12 PRO Automated Transmission

The new PACCAR TX-12 is now available with Kenworth Medium Duty Models

July 4, 2025

Kenworth Continues Expansion of PACCAR TX-12 PRO Automated Transmission — Kenworth Truck Company releases the T380.
Photo: Kenworth

2 min to read

Kenworth Continues Expansion of Duty Models

Kenworth is expanding availability of its popular PACCAR TX-12 PRO automated transmission, bringing it 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.

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 on-highway and for vocational use, with up to 450 hp with 1,250-pound feet of torque for fire service vehicles.

“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 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.”

The PACCAR TX-12 PRO is designed for rugged service and low-end drive performance applications like dump truck, snowplow, or in chassis-mounted tanker configuration. Additionally, the TX-12 PRO features an Extreme Duty clutch for low-speed maneuvering, and a Rock Free mode to help trucks get unstuck in mud or sand. 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 those applications requiring a PTO, The TX-12 PRO is available with dual openings – a bottom mount 8-bolt and 4-bolt rear mount for a combined 95 hp capacity.

To monitor performance and to ensure a long-life, the transmission and clutch are both equipped with internal oil temperature sensors. 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.

More information on PACCAR transmissions is available on the PACCAR Powertrain website at https://paccarpowertrain.com/.

Topics:Paccar Vocational Fleets Powertrains Automated Transmissions Vehicle Research

More Vehicle Research

A graphic including Emkay's building celebrating 80 years in fleet.

Vehicle Research•by Staff•May 13, 2026

Inside Emkay's 80th Anniversary Celebration [Watch]

EMKAY recently celebrated a major milestone: 80 years in the fleet industry.

Cover of a whitepaper titled “The Hidden Costs of Departmentally Assigned Vehicles on Your Fleet” featuring a black fleet vehicle driving on a road at sunset. Subheadline reads: “Discover how your fleet can reduce costs and minimize risk by implementing vehicle sharing.” The document focuses on fleet optimization, vehicle sharing, cost reduction, utilization tracking, and risk management for fleet operations.

Why Fleet Managers Are Replacing Departmental Vehicles with Shared Motor Pools

Departmentally assigned vehicles often create hidden costs through underutilization, poor visibility, and increased administrative burden. This white paper explores how shared motor pool strategies help fleets reduce costs, improve accountability, and optimize vehicle utilization.