Following its successful Australian debut at the 2025 Brisbane Truck Show, Cummins is continuing to demonstrate the capabilities of its fully integrated heavy-duty powertrain, for the local market, highlighting the next evolution in performance, efficiency, and total vehicle optimisation.
Bringing together the X15 engine, Eaton Cummins Endurant 18-speed automated transmission, and Meritor axles, brakes, and drivelines, the system represents a unified Cummins solution from engine to road – a major milestone in the company’s transformation into a complete, fuel-diverse and digitally connected powertrain provider.
“This is more than a powertrain – it’s a platform for optimisation,” says Cummins Drivetrain and Braking Systems (Australia) Managing Director, David Cole.
“It’s a system designed to reduce downtime, improve fuel economy, and lower total cost of ownership.”
The integrated powertrain is the result of Cummins’ strategic 2022 acquisition of Meritor, which complements the established Eaton Cummins joint venture and gives Cummins the ability to engineer and integrate all major drivetrain elements.
This synergy is delivering smarter, more connected, and highly efficient solutions designed specifically for Australia’s demanding linehaul and vocational transport sectors.
At the heart of the integrated powertrain sits the Cummins X15, one of the most widely adopted heavy-duty engines across Australian fleets.
The Euro VI compliant X15 is available in two configurations designed to meet different fleet requirements. The Performance Series delivers outputs ranging from 525 to 625 horsepower with torque ratings between 1850 and 2025 lb-ft, providing the strong pulling power required for high productivity freight operations.
While, for fleets prioritising fuel economy on long-distance routes, the Efficiency Series offers 550 to 580 horsepower with up to 2050 lb-ft of torque, for long-haul efficiency without compromising durability.
Several advanced technologies underpin the latest generation of the X15 platform. A newly designed wastegate turbocharger improves engine responsiveness and overall efficiency by enhancing airflow and boost control across the operating range.
Fuel delivery is managed through the next-generation Cummins XPI common rail fuel system, which delivers precise injection timing and pressure control to optimise combustion efficiency and reduce fuel consumption.
The engine also meets Euro VI emissions compliance without the use of Exhaust Gas Recirculation (EGR), simplifying the engine architecture while maintaining stringent emissions performance. Cummins has also reduced the number of routine maintenance components within the engine design, helping operators improve uptime and reduce total cost of ownership.
Power from the X15 is delivered through the Eaton Cummins Endurant XD Pro 18-speed automated transmission, bringing next generation shift logic and precision to the integrated system.
Designed for torque ratings up to 2779Nm, the Endurant XD Pro delivers smoother, faster shifting, even in steep terrain and tough operating conditions. Paired with the X15’s strong low-end torque, the result is a seamless and efficient driving experience.
With the engine and transmission electronically integrated, Cummins engineers can calibrate torque delivery, shift points, and engine braking as a single system, ensuring the drivetrain operates at peak efficiency.
Completing the front end of the drivetrain is the Meritor MFS™ Series steer axle, designed to deliver durability and performance in demanding applications.
The steer axle features an optimised beam design that reduces weight while maintaining structural integrity and long service life. It also incorporates machined bias camber, engineered specifically to suit Australian road conditions and improve tyre wear characteristics over high-kilometre operations.
At the rear of the drivetrain sits the Meritor 160™ tandem drive axle, widely trusted in linehaul and commercial fleets across Australia.
The axle features durable hypoid gearing available in 14 ratios, allowing fleets to select the optimal gearing configuration based on vehicle application and duty cycle.
For linehaul fleets focused on efficiency, a high efficiency pumpless specification removes the oil pump, reducing parasitic losses within the axle and improving fuel economy by up to 1.5 per cent.
For vocational fleets, a version with an integrated oil pump provides increased durability and protection in heavy-duty and off-road applications.
The driveline is completed by Meritor RPL Permalube driveshafts, engineered to be maintenance-free for more than one million kilometres and designed to deliver durability and reliability in high-kilometre operations.
“It is designed as a single system, with every component calibrated and integrated to work together, reducing friction points and improving uptime,” David Cole says.
By engineering the entire drivetrain as a unified system, Cummins is able to optimise torque curves, gear selection and axle ratios to deliver improved fuel efficiency and smoother overall performance.
Through Cummins’ expansive national service and support network, and part retailers, fleet operators can also access diagnostics, training, and parts support to maximise uptime and ensure rapid response, no matter where the vehicle is operating.
The Cummins-Meritor range also include locally assembled and application-specific drivetrain solutions designed to meet the unique requirements of Australian transport operators.
These Australian-engineered enhancements reinforce Cummins’ long-standing commitment to local industry, job creation, and delivering solutions tailored for the region’s demanding operating conditions.
In other news, read the TIC report which shows truck sales are slipping.
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