Few things, if anything, are more important for a combat vehicle navigating contested environments than the dependability of its propulsion and power availability. Both sit at the heart of whether the vehicle’s systems will continue to function as mechanical stress and electrical demand compound over time. Advances in technology—while game-changing for battlefield capabilities—have placed added strain on the underlying drivetrain and electrical architecture of modern platforms, pushing them beyond the design intent of legacy systems.
Today’s modern combat vehicles carry an ever-growing electrical burden. Sensors, communication systems, electronic warfare tools, and onboard computing have become essential for survival on the battlefield. At the same time, these platforms must operate longer, under greater mechanical stress, with fewer opportunities for maintenance or recovery. Meeting those demands is key to maintaining in-theatre mobility and ensuring Soldier survivability, which is exactly why American Rheinmetall partnered with Allison Transmission on its solution for the Army’s XM30 next-generation combat vehicle program.
As a key member of the American Rheinmetall-led industry team, known as Team Lynx, Allison is supplying the eGen Force™ a hybrid transmission system which includes both the powertrain foundation, and the electrical power needed to run next-generation mission systems on the Lynx XM30.
Meeting Power and Mobility Demands
The Lynx XM30 will replace the Bradley and represents a major generational leap compared to existing and legacy combat vehicles—not simply because of the capabilities it brings to the battlefield, but because of how the vehicle produces and manages power to sustain those capabilities. Many of the advantages the Lynx XM30 delivers, from sensors and counter-UAS systems to onboard computing and communications, are fundamentally power-dependent. Meeting that demand requires a propulsion architecture capable of generating and managing significant electrical load without sacrificing mobility.
Allison addressed these requirements in the eGen Force by treating platform electrification and propulsion as integrated functions of the same system. The eGen Force propulsion system architecture achieves significant efficiency gains via use of a new 8-speed drive system. Improvements in propulsion efficiency mean performance targets can be met while sending more power to on-board electrical systems.
Critically, the Lynx XM30 has been designed with additional electrical and mechanical power margin beyond current operational requirements. As mission systems evolve and electrical demands grow, the eGen Force enables the platform to integrate next-generation technologies without a fundamental redesign.
“The selection of the eGen Force architecture resulted from detailed design studies weighing performance, efficiency and functionality targets appropriate for next generation tracked vehicle propulsion,” said Michael York who leads the Defense Engineering team at Allison Transmission. “The architecture, which offers conventional, hybrid and electric-only propulsion, represents a significant step forward in all regards without compromising on the foundation of high system durability.”
Designed for Durability and Sustainment
Tracked combat vehicles operate under punishing duty cycles. Shock loads, extreme temperatures, prolonged missions, and limited maintenance windows all affect how propulsion systems perform over time. Allison’s approach to durability draws on decades of experience supporting tracked military platforms under these conditions.
“System durability has been a focal point for the Allison team since we began work on the eGen Force,” York said. “Our customers expect dependability, and we’ve leveraged knowledge and experience from developing and supporting many products across a wide spectrum of applications to deliver on that expectation.”
Allison’s experience in supplying transmissions for U.S. tracked vehicles dates back more than 75 years and includes the X1100™ transmission for the Abrams platform since the program’s earliest years. Lessons from those programs directly inform how Allison engineers products for longevity. “This is about incorporating real-world operating data rather than theoretical assumptions,” York added.
Allison’s focus on durability also extends directly to sustainment. According to York, the development process of its eGen Force prioritized maintainability and serviceability to “simplify interactions with the system” over its entire lifecycle. The team treated component accessibility and serviceability as a core design requirement while also implementing system redundancies for continued operation under duress.
Industrial Readiness at Scale
American Rheinmetall’s Lynx XM30 solution places equal weight on industrial execution, and Allison enters with an established U.S. manufacturing base already producing and sustaining tracked vehicle transmissions.
Allison’s defense manufacturing operations are centered in Indianapolis, where the company manages design, development, testing and production. As a result, the Lynx XM30’s propulsion manufacturing capacity is already operational.
With a robust and active manufacturing footing in place, delays associated with a ‘cold start’ are heavily mitigated because the infrastructure does not need to be built or reactivated. Once the program is selected to proceed into Low-Rate Initial Production (LRIP), propulsion production can scale immediately alongside the vehicle without creating schedule uncertainty.
A Strategic, Integrated Partnership
Allison’s role in the XM30 program is rooted in deep engineering alignment with American Rheinmetall and the broader Team Lynx partners. The company works closely with American Rheinmetall to integrate its propulsion system directly with vehicle-level systems throughout vehicle development.
According to York, the partnership “blossomed” because both companies aligned on a single goal: “developing the next-generation platform that will support the Soldier the way that we know the Soldier needs to be supported.”
Many team members in both organizations are combat or military veterans. They know mobility and survivability can’t be separated in contested environments. Propulsion failures have immediate consequences for formations under fire, and that reality drives how the team collectively works to eliminate performance gaps that could put crews at risk while ensuring the system delivers its full potential.
“The team’s focus is now on integration,” said York. “It’s the optimization of that integration that allows us to extract the full potential of the system.”
This level of collaboration supports American Rheinmetall’s role as Lead Systems Integrator. By treating power generation, mobility, and vehicle architecture as a unified ecosystem, the partnership ensures the Lynx XM30 functions as an integrated fighting system where combined capabilities exceed what individual subsystems could achieve independently.
Built to Keep Formations Moving
In combat, propulsion system up-time has an immediate impact on the success of the mission. Vehicles that can’t generate power or sustain movement put crews and formations at risk. Allison’s role in the XM30 program ensures focus on preventing those failures, prioritizing solutions designed for endurance and supported by an industrial base already sustaining the Army’s most critical tracked platforms.
By combining a propulsion architecture built for modern power demands with a manufacturing infrastructure proven through long-term service, Allison brings a level of continuity and reliability that supports sustained readiness across the XM30 program. The result is a vehicle better positioned to support Soldiers in fast-moving, contested environments where mobility and survivability are inseparable.