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Allison 4000 Series™ Transmission Now Available with CARB-Compliant PACCAR MX-13 Engine

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Allison Transmission (NYSE:ALSN) announced that its 4000 Series™ fully automatic transmission is now compatible with the CARB low NOx compliant PACCAR MX-13 engine for Kenworth T880 and Peterbilt Model 567 truck models. This marks the only fully automatic transmission available with the MX-13 engine that meets CARB compliance standards.

The integration features Allison's FuelSense® 2.0 technology, which can deliver up to 6% fuel savings through dynamic shift point adjustments and torque optimization. The transmission comes with six or seven forward gears and includes features like DynActive® Shifting, Neutral at Stop, and Acceleration Rate Management to enhance vehicle efficiency.

Allison Transmission (NYSE:ALSN) ha annunciato che la sua trasmissione completamente automatica della serie 4000™ è ora compatibile con il motore PACCAR MX-13 conforme ai bassi NOx secondo gli standard CARB, destinato ai modelli di camion Kenworth T880 e Peterbilt Model 567. Questa è l'unica trasmissione completamente automatica disponibile con il motore MX-13 che rispetta gli standard di conformità CARB.

L'integrazione include la tecnologia FuelSense® 2.0 di Allison, che può garantire fino al 6% di risparmio di carburante grazie a regolazioni dinamiche dei punti di cambiata e all'ottimizzazione della coppia. La trasmissione è disponibile con sei o sette marce avanti e comprende funzionalità come DynActive® Shifting, Neutral at Stop e Acceleration Rate Management per migliorare l'efficienza del veicolo.

Allison Transmission (NYSE:ALSN) anunció que su transmisión totalmente automática de la serie 4000™ ahora es compatible con el motor PACCAR MX-13 de bajas emisiones NOx conforme a CARB para los modelos de camiones Kenworth T880 y Peterbilt Model 567. Esta es la única transmisión totalmente automática disponible con el motor MX-13 que cumple con los estándares de conformidad CARB.

La integración incluye la tecnología FuelSense® 2.0 de Allison, que puede ofrecer hasta un 6% de ahorro de combustible mediante ajustes dinámicos de los puntos de cambio y optimización del torque. La transmisión cuenta con seis o siete marchas hacia adelante e incluye características como DynActive® Shifting, Neutral at Stop y Acceleration Rate Management para mejorar la eficiencia del vehículo.

Allison Transmission (NYSE:ALSN)은(는) 4000 시리즈™ 완전 자동 변속기가 Kenworth T880 및 Peterbilt Model 567 트럭 모델용 CARB 저 NOx 준수 PACCAR MX-13 엔진과 호환 가능하다고 발표했습니다. 이는 CARB 준수 기준을 충족하는 MX-13 엔진과 함께 제공되는 유일한 완전 자동 변속기입니다.

이 통합에는 Allison의 FuelSense® 2.0 기술이 적용되어 동적 변속 지점 조정과 토크 최적화를 통해 최대 6% 연료 절감을 제공합니다. 변속기는 6단 또는 7단 전진 기어를 제공하며, DynActive® Shifting, Neutral at Stop, Acceleration Rate Management와 같은 기능을 포함하여 차량 효율성을 향상시킵니다.

Allison Transmission (NYSE:ALSN) a annoncé que sa transmission entièrement automatique de la série 4000™ est désormais compatible avec le moteur PACCAR MX-13 conforme aux faibles émissions NOx CARB pour les modèles de camions Kenworth T880 et Peterbilt Model 567. Il s'agit de la seule transmission entièrement automatique disponible avec le moteur MX-13 répondant aux normes de conformité CARB.

L'intégration comprend la technologie FuelSense® 2.0 d'Allison, qui peut offrir jusqu'à 6 % d'économie de carburant grâce à des ajustements dynamiques des points de changement et à l'optimisation du couple. La transmission est équipée de six ou sept rapports avant et comprend des fonctionnalités telles que DynActive® Shifting, Neutral at Stop et Acceleration Rate Management pour améliorer l'efficacité du véhicule.

Allison Transmission (NYSE:ALSN) gab bekannt, dass seine vollautomatische 4000 Series™-Getriebe nun mit dem CARB-konformen, niedrigen NOx PACCAR MX-13-Motor für die Lkw-Modelle Kenworth T880 und Peterbilt Model 567 kompatibel ist. Dies ist das einzige vollautomatische Getriebe, das mit dem MX-13-Motor erhältlich ist und die CARB-Konformitätsstandards erfüllt.

Die Integration umfasst Allisons FuelSense® 2.0-Technologie, die durch dynamische Schaltpunktanpassungen und Drehmomentoptimierung bis zu 6 % Kraftstoffeinsparung ermöglichen kann. Das Getriebe verfügt über sechs oder sieben Vorwärtsgänge und bietet Funktionen wie DynActive® Shifting, Neutral at Stop und Acceleration Rate Management zur Steigerung der Fahrzeugeffizienz.

Positive
  • First and only CARB-compliant fully automatic transmission for PACCAR MX-13 engine
  • FuelSense® 2.0 technology delivers up to 6% fuel savings
  • Expanded market reach in construction, energy, mining, defense and vocational trucking sectors
Negative
  • None.

Insights

Allison's 4000 Series with PACCAR's CARB-compliant engine creates a strategic market advantage in emissions-restricted environments while maintaining performance.

This partnership between Allison Transmission and PACCAR represents a significant technological advancement in the heavy-duty commercial vehicle sector. The pairing of Allison's 4000 Series transmission with PACCAR's MX-13 engine creates the only fully automatic transmission option that meets California Air Resources Board's (CARB) stringent low NOx emissions standards for these particular Kenworth and Peterbilt models.

From a technical perspective, this integration offers substantial benefits to fleet operators. The Allison torque converter multiplies engine torque during startup, which is critical for heavy-duty applications in construction, mining, and vocational trucking. This characteristic is particularly valuable when coupled with a low-emissions engine, which might otherwise sacrifice some performance to achieve regulatory compliance.

The inclusion of FuelSense® 2.0 technology further strengthens the value proposition. The dynamic shifting algorithms that adjust based on load and driving conditions can deliver up to 6% fuel savings, addressing a key operational cost for fleet managers. Features like DynActive® Shifting and Neutral at Stop specifically target efficiency improvements in the stop-start cycles common in vocational applications.

What makes this announcement particularly noteworthy is the timing within the industry's regulatory landscape. As emissions regulations tighten nationwide (following California's lead), Allison positions itself as a ready solution for OEMs and fleet operators needing to meet these standards without compromising vehicle performance. This creates a competitive advantage in markets where emissions compliance is increasingly restrictive.

New and Only CARB-Compliant Fully Automatic Transmission and Diesel Engine Pairing to Deliver Lower Emissions While Maintaining Optimized Performance for Heavy-Duty Vehicles

INDIANAPOLIS, July 30, 2025 /PRNewswire/ -- Allison Transmission is pleased to announce the Allison 4000 Series™ fully automatic transmission is now available with the new CARB low NOx compliant PACCAR MX-13 engine for Kenworth T880 and Peterbilt Model 567 truck models. The Allison 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 NOx emissions.

"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, Allison Transmission. "Our proven history of exceeding customer expectations across a wide range of vehicle applications positions us to support the changing dynamics of future powertrains and Improve the Way the World Works."

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

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

About Allison Transmission
Allison Transmission (NYSE: ALSN) is a leading designer and manufacturer of propulsion solutions for commercial and defense vehicles and the largest global manufacturer of medium- and heavy-duty fully automatic transmissions that Improve the Way the World Works. Allison products are used in a wide variety of applications, including on-highway vehicles (distribution, refuse, construction, fire and emergency), buses (school, transit and coach), motorhomes, off-highway vehicles and equipment (energy, mining, construction and agriculture) and defense vehicles (tactical wheeled and tracked). Founded in 1915, the company is headquartered in Indianapolis, Indiana, USA. With a presence in more than 150 countries, Allison has regional headquarters in the Netherlands, China and Brazil, manufacturing facilities in the USA, Hungary and India, as well as global engineering resources, including electrification engineering centers in Indianapolis, Indiana, Auburn Hills, Michigan and London in the United Kingdom. Allison also has approximately 1,600 independent distributor and dealer locations worldwide. For more information, visit allisontransmission.com.

© PACCAR Inc. Kenworth® Allison 4000 Series™ fully automatic transmission is now available with the new CARB low NOx compliant PACCAR MX-13 engine for Kenworth T880 and Peterbilt Model 567 truck models.

Cision View original content to download multimedia:https://www.prnewswire.com/news-releases/allison-4000-series-transmission-now-available-with-carb-compliant-paccar-mx-13-engine-302517887.html

SOURCE Allison Transmission, Inc.

FAQ

What is the significance of Allison's 4000 Series transmission being CARB-compliant with PACCAR MX-13 engine?

It is the first and only fully automatic transmission available with the MX-13 engine that meets CARB compliance standards, enabling lower NOx emissions while maintaining optimal performance.

How much fuel savings can the Allison FuelSense® 2.0 technology provide?

The FuelSense® 2.0 technology can provide fuel savings of up to 6% through dynamic shift point adjustments and torque optimization based on load and driving conditions.

Which truck models will feature the Allison 4000 Series transmission with PACCAR MX-13 engine?

The transmission will be available on the Kenworth T880 and Peterbilt Model 567 truck models.

What are the key features of Allison's FuelSense® 2.0 technology?

Key features include DynActive® Shifting, Neutral at Stop, and Acceleration Rate Management, which work together to minimize energy losses and enhance vehicle efficiency.
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