The TX-12 PRO automated transmission is now available with the heavy-duty Peterbilt Model 567 and 579 and the Kenworth T680 and T880.

The manufacturer has said that its Model 579, 567, and 520 truck ranges may now be specified with the new Cummins engine, with start of production scheduled for the third quarter of this year.

The parent of DAF, Kenworth, and Peterbilt announced record sales revenue of USD35.13bn in 2023, a 22% improvement on its performance in the year before (USD28.82bn).

The “Legendary Package” is a special version of the Class 8 Model 589 range with retro styling and vintage Peterbilt branding inside and out.

Both configurations feature a body which Peterbilt said it developed in collaboration with “leading” car carriers.

For the first time, the Model 579 will incorporate automatic “stop & go” functionality for resuming a pre-set cruise speed after an automatic braking event.

Built for the U.S. Department of Energy’s SuperTruck II programme, the prototype truck, described by Paccar as a “testbed for future product technologies”, was developed in order to improve freight ton efficiency by 100% compared to a 2009 baseline.

Massey Motor Freight of Nacogdoches, Texas acquired the 100,000th model, a limited-release ‘Model 389X’ special edition vehicle.

The Primaax EX is recommended to customers who need trucks for vocational and heavy haulage applications.

The TX-18 Pro automated transmission will come with two new features: Off-Road Calibration and Rock-Free Mode.

The Model 589 also features Peterbilt’s latest advanced driver assistance systems, including collision mitigation and predictive cruise control to improve safety and fuel economy.

The truck – a Peterbilt Model 579 – featured a Cummins ‘X15H’ engine, providing up to 500 horsepower (372 kW) and up to 1,900 lb-ft torque.