Allison S9810AR

The Allison S9810AR transmission is the most advanced and robust model in the Allison “S” Series, engineered specifically for ultra-heavy tracked military vehicles operating under the most extreme conditions. Combining exceptional torque capacity, rugged military-specific architecture, and an integrated hydraulic retarder, the S9810AR delivers unmatched power, braking performance, and reliability in a compact horizontal layout.

The “A” designation indicates a fully automatic configuration with a high-capacity hydrodynamic torque converter and lock-up clutch for efficient power transfer and fuel economy. The “R” signifies the inclusion of a built-in hydraulic retarder, which adds significant braking force to support safe, controlled descents and reduce wear on service brake systems—critical for vehicles operating on steep grades or in combat logistics roles.

Designed to accommodate gross vehicle weights exceeding 180,000 lbs, the S9810AR is a key transmission solution for combat engineering vehicles, heavy tracked transporters, bridge layers, and mobile artillery platforms. With electronic shift management, field-serviceable modular design, and Allison’s proven battlefield reliability, the S9810AR is a trusted solution for modern military fleets around the world.

Key Benefits of the S9810AR Transmission

• Highest torque and weight capacity in the Allison S-Series
• Built-in hydraulic retarder provides crucial braking support in off-road and combat conditions
• Horizontal design allows integration into low-profile vehicle hulls
• Proven in global military fleets and extreme operational settings
• Advanced electronic shift control ensures performance, protection, and efficiency
• Ideal for heavy-duty, high-mobility tracked military platforms

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Technical Specifications:

• Model: S9810AR
• Series: Allison Specialty “S” Series
• Transmission Type: Fully automatic planetary transmission with integrated hydraulic retarder
• Mounting Orientation: Horizontal (low-profile installation for armored hulls)
• Speeds: 6 forward, 1 reverse
• Torque Converter: Heavy-duty hydrodynamic converter with lock-up clutch
• Integrated Retarder: Yes – high-capacity hydraulic retarder for auxiliary braking
• Maximum Input Torque: Up to 3,000 lb-ft (4,068 Nm)
• Gross Vehicle Weight Rating (GVWR): 170,000–190,000+ lbs (77,100–86,000+ kg), vehicle-dependent
• Primary Applications:
  • Armored combat bridge layers
  • Mobile tracked artillery and defense systems
  • Tracked recovery and heavy logistics platforms
  • Tactical engineering and deployment vehicles
• Cooling System:
  • Dual-path cooling required for both transmission and retarder systems
  • Compatible with oil-to-air and oil-to-water cooling configurations
• Lubrication System:
  • Full-pressure lubrication with multi-stage internal filtration
• Oil Specification: TES-295 or TES-668 synthetic automatic transmission fluid
• Electronic Controls:
  • Integrated Allison Transmission Control Module (TCM)
  • Adaptive shift logic based on terrain, engine load, and operator demand
  • Retarder management integrated with vehicle braking system
• Diagnostics Compatibility:
  • Supports Allison DOC® for live diagnostics, fault logging, and maintenance alerts
  • Monitors oil condition, clutch health, retarder engagement, and system temperatures
• PTO Capability: Optional, depending on vehicle configuration
• Dry Weight: Approx. 2,400–2,600 lbs (1,089–1,179 kg)
• Durability Features:
  • Military-grade hardened housing and internals
  • Sealed and EMI-protected electronic systems
  • Modular construction for rapid maintenance and component replacement
  • Built to perform in extreme terrain, temperature, and operational environments