Allison 4000 Series transmission now available with CARB-compliant Paccar MX-13 engine

Allison Transmission announced that the Allison 4000 Series fully automatic transmission is now available with the new California Air Resources Board (CARB) low-NOx-compliant Paccar MX-13 engine for Kenworth T880 and Peterbilt Model 567 truck models. Allison said the 4000 Series is the only fully automatic transmission available with the MX-13 engine that is CARB-compliant, and the pairing is designed to optimize performance and reduce nitrogen oxides (NOx) emissions.

The Allison 4000 Series transmission is now available with the CARB-compliant Paccar MX-13 engine for Kenworth T880 and Peterbilt Model 567 trucks. (Photo: Paccar)

“Integrating the Allison 4000 Series into vehicles equipped with the CARB-compliant Paccar MX-13 engine will support efficiency and fuel economy while still delivering on our promise of reliability and productivity,” said Rohan Barua, vice president, North America Sales, Global Channel and Aftermarket for Allison.

The Allison 4000 Series transmission is used across multiple commercial vehicle applications, including construction, energy, mining, defense and vocational trucking. It is available in various configurations, offering six or seven forward gears depending on the model.

The 4000 Series is designed to provide an ideal balance of performance and fuel efficiency, Allison said, leveraging the company’s torque converter to multiply engine torque, significantly improving startability, drivability and overall productivity.

Additonally, Allison’s FuelSense 2.0 technology, which is designed to optimize performance in automatic transmissions for commercial vehicles, is available on the Peterbilt Model 567 and standard on Kenworth T880 truck models. It dynamically adjusts shift points and torque based on load and driving conditions, providing quantifiable fuel savings of up to 6 percent, Allison said. Key features, such as DynActive Shifting, Neutral at Stop and Acceleration Rate Management, work together to minimize energy losses and enhance overall vehicle efficiency, the company added.