Allison S9810MR

The Allison S9810MR is a heavy-duty, fully automatic transmission designed for the most demanding tracked military applications. This model combines the horizontal mounting of the S-series with the durability-enhanced design of the “M” variant, and includes an integrated hydraulic retarder (R) for supplemental braking performance. The result is a transmission system optimized for ultra-heavy armored vehicles, delivering reliable torque management, reduced maintenance burden, and enhanced vehicle control across rugged, off-road environments.

The “M” designation indicates reinforced construction tailored to military-grade durability, including enhanced sealing, vibration resistance, and a ruggedized housing for sustained performance under severe battlefield conditions. The “R” represents the built-in hydraulic retarder, which provides essential braking support in hilly terrain or high-load scenarios, significantly reducing wear on the primary braking system.

Capable of managing input torques up to 3,000 lb-ft and supporting vehicle weights in excess of 190,000 lbs, the S9810MR is ideal for integration into combat bridge layers, recovery vehicles, tracked artillery systems, and armored logistics platforms. Its modular, electronically-controlled architecture ensures reliable serviceability and smooth operation under extreme loads and diverse operating environments.

Key Benefits of the S9810MR Transmission

• High-capacity design tailored to the most extreme combat and engineering applications
• Integrated hydraulic retarder reduces brake wear and improves safety
• Horizontal configuration enables low-profile vehicle integration
• Ruggedized “M” military variant for sustained battlefield performance
• Supports adaptive shift strategies under changing terrain and load conditions
• Proven reliability across international defense platforms and OEM installations

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Technical Specifications:

• Model: S9810MR
• Series: Allison Specialty “S” Series
• Transmission Type: Fully automatic planetary transmission with integrated hydraulic retarder
• Mounting Orientation: Horizontal (low-profile for armored vehicle integration)
• Speeds: 6 forward, 1 reverse
• Torque Converter: Military-grade 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): 180,000–200,000+ lbs (81,600–90,700+ kg), depending on configuration
• Primary Applications:
  • Mobile self-propelled artillery and rocket launcher systems
  • Armored engineering and earth-moving tracked vehicles
  • Tracked logistics carriers with steep-grade braking requirements
  • Bridge layer and tactical recovery vehicle platforms
• Cooling System:
  • Dual-path cooling (dedicated lines for transmission and retarder circuits)
  • Supports oil-to-water and oil-to-air cooling configurations
• Lubrication System:
  • Full-pressure lubrication with high-capacity filtration
• Oil Specification: TES-295 or TES-668 synthetic automatic transmission fluid
• Electronic Controls:
  • Integrated Transmission Control Module (TCM) with programmable logic
  • Terrain-adaptive shift mapping
  • Retarder control integrated with service brake logic
• Diagnostics Compatibility:
  • Compatible with Allison DOC® software
  • Monitors clutch health, fluid temperature, retarder usage, and fault history
• PTO Capability: Optional
• Dry Weight: Approx. 2,600–2,800 lbs (1,179–1,270 kg)
• Durability Features:
  • Reinforced housing for high-impact, off-road environments
  • Vibration and EMI-shielded electronic connectors
  • Modular architecture for ease of field repair and servicing
  • Built to military-grade performance and environmental specs (shock, temperature, ingress)