International Integrates Allison Transmissions into S13 Powertrain
Allison’s 3414 automatic transmission is now available as a fully integrated option with the S13 powertrain for International RH and HX Series trucks.

The Allison 3414 Regional Haul Series (RHS) automatic transmission is now available to order in International RH trucks equipped with the S13 engine.
Photo: Navistar
Allison Transmission announced that International Truck, a Navistar brand, has integrated its fully automatic transmissions into S13 powertrain-equipped trucks.
Through the partnership's continued collaboration, the Allison 3414 Regional Haul Series (RHS) is now available to order in International RH trucks equipped with the S13 engine. Additionally, the Allison 4000 Series is also available to order with S13-equipped International HX trucks.
Additional S13 Transmission Options
As part of the S13 engine launch plan, Navistar recognized the need for additional powertrain options. With the combination of Allison fully automatic transmissions, International's RH and HX platforms, and the Navistar S13 engine, customers are presented with two high-performance solutions with superior acceleration and optimized efficiency.
"We are proud to collaborate with International Truck to pair both the 3414 RHS and 4000 Series fully automatic transmissions with the Navistar S13 engine for an industry-leading driving experience," said Rohan Barua, vice president, North America Sales, global channel and aftermarket at Allison Transmission. "Specifically, the 3414 RHS fully automatic transmission offers increased horsepower and a lighter weight, translating into more deliveries, more loads and more productivity."
Since launching with the Navistar A26 engine in 2020, 3414 RHS-equipped International RH trucks have been selected by some of the largest fleets in North America including leading wholesale food distributors. The fully automatic transmission has also gained traction with regional food and beverage distribution fleets, Allison said.
The 3414 RHS fully automatic transmission is designed to enhance vehicle handling and maneuverability in urban duty cycles, the OE said. It provides performance and efficiency while improving fuel economy by up to 8% compared to the Allison 3000 Highway Series transmission. Additionally, it eliminates downtime associated with automated manual transmissions (AMTs) by avoiding the need for clutch replacements.
More Equipment

Atlas Expands Kodiak Driverless Truck Fleet in Permian Basin
Atlas Energy Solutions is expanding autonomous frac sand hauling in the Permian Basin with a second load-out location and plans for 100 driverless trucks by mid-2027.
Read More →
Putting Mack’s Command Steer to the Test
A test drive of Mack’s Command Steer active steering system evaluates how it can make truck driving easier and less tiring.
Read More →
Mack, Volvo Expand DEF Derate Software Updates
The updated software gives Mack and Volvo truck owners more time to address DEF-related issues before the engine derates or the vehicle goes into reduced-speed inducement, following new EPA guidance.
Read More →
Rush, MCT Team Up to Grow Refrigeration Service Network
The joint venture will operate MCT's network of Carrier Transicold dealerships and mobile service locations, with the companies promising greater service capacity and uptime for refrigerated fleets.
Read More →
Cummins Adjusts 2027 Engine Rollout After EPA Proposal
The engine maker will gradually introduce its new Model Year 2027 diesel engines while continuing to offer current models during the transition, citing the EPA's proposed emissions rule changes.
Read More →
Aurora Rolls Out Next Generation of Driverless Trucks for Commercial Freight
Aurora's latest autonomous trucks it's rolling out with International feature lower-cost hardware designed for a million miles as the company expands commercial driverless freight operations across the U.S. Sun Belt.
Read More →
Peterbilt 589 Spotlight: A Close Look at a Custom Working Truck [Video]
There's more to this customized Peterbilt Model 589 and Great Dane refrigerated trailer than chrome and stainless (although there's plenty of that too!) A veteran driver explains the design choices and practical features behind this working truck.
Read More →
Continental Expands Retread Lineup With New ContiTread HDL 5 EP
New long-haul drive retread is designed to improve fuel efficiency, extend tread life, and lower fleets' cost per mile.
Read More →
EPA Proposal Could Ease 2027 Truck Costs and Buying Uncertainty
The proposal doesn't change the tougher NOx standard, but it would revise key implementation requirements that manufacturers say have driven up costs and complicated fleet purchasing decisions.
Read More →
Cummins, Paccar Ease DEF Derates After EPA Guidance
Updated diesel engine software gives truck operators more time to address emissions-system issues while staying compliant with EPA emissions standards.
Read More →
