Peterbilt adds Ultrashift Plus, ISX12 G to Natural Gas Lineup
The Eaton UltraShift Plus is available in the 13-speed MHP and 10-speed LAS series and the 11.9-liter Cummins Westport ISX12 G is available up to 400 horsepower and 1,450 lb.-ft. of torque.
by Staff
June 3, 2014
CNG-powered Peterbilt Model 579.
1 min to read
Several trucks in Peterbilt's stable of natural gas powered vehicles can now be ordered with the Eaton UltraShift Plus automated manual transmission and a Cummins Westport ISX12 G engine. These include the Models 579, 567, 384 and 365.
CNG-powered Peterbilt Model 579.
“This new powertrain is an ideal option for our customers in vocational, regional and line haul applications, providing precise shifting for more efficient operation with a versatile, fuel efficient natural gas engine,” said Robert Woodall, Peterbilt’s Director of Sales and Marketing. “It’s a great way to maximize the fuel economy benefits of our aerodynamic, lightweight vehicles.”
Ad Loading...
The Eaton UltraShift Plus is available in the 13-speed MHP and 10-speed LAS series and the 11.9-liter Cummins Westport ISX12 G is available up to 400 horsepower and 1,450 lb.-ft. of torque.
The automated transmission features intelligent shift selection software that optimizes performance and efficiency, as well as tailored shift logic that enhances braking performance. It can benefit both new and veteran operators through precision shifting that senses and adjusts to grades, weight and driver throttle commands.
“The addition of this powertrain option to our natural gas vehicle lineup expands the versatility and range of our already industry-leading breadth of natural gas vehicles,” Woodall said. “Customers can choose from a wide range of vehicles, engines and spec options to meet their full range of needs.”
Aerodynamic wheel covers can deliver small but meaningful fuel-economy gains for fleets, and Deflecktor says its latest design aims to make the technology easier and more affordable to deploy.
Fontaine is broadening its flatbed lineup with new models aimed at fleets, including a lightweight aluminum trailer expected in 2027 that emphasizes durability, repairability, and lower cost.
A new prototype from Fontaine Trailer focuses on what fleets say they need most: easier repairs, lower maintenance costs, and practical, service-friendly design.
Heavy Duty Trucking's Top 20 Products awards recognize the best new products and technologies. Check out the award presentations at the 2026 Technology & Maintenance Council annual meeting.
The Detroit® Gen 6 engine platform proves that real progress doesn’t require a complete redesign. Built on 20 years of trusted technology, these engines are designed for efficiency, stronger performance, and greater reliability than before. And they do it all while complying with 2027 EPA standards on every mile.
From pricing intelligence and compliance tools to charging infrastructure, diagnostics, tires, and AI, HDT’s 2026 Top 20 Products recognize the new tools, technologies, and ideas heavy-duty trucking fleets are using to run their businesses.
Geotab launches GO Focus Pro, an AI-powered 360-degree dash cam designed to reduce collisions, prevent fraud, and protect fleets from nuclear verdict risk.
Fleet software is getting more sophisticated and effective than ever, tying big data models together to transform maintenance, safety, and the value of your existing tech stack. Fleet technology upgrades are undoubtedly an investment, but updated technology can offer a much higher return. Read how upgrading your fleet technology can increase the return on your investment.
Boost your fleet's financial performance with our essential guide, "Maximizing financial impact." Learn to define KPIs, strategically use data to reduce costs, and leverage automation for more efficient operations. Download it today and discover your potential for improved financial performance!
