Allison S9810H

The Allison S9810H transmission is a high-capacity, fully automatic, horizontally-mounted transmission engineered for extreme-duty tracked military vehicles. A member of the Allison “S” Series, the S9810H is designed to deliver outstanding performance in tight, low-clearance chassis configurations, such as those found in armored engineering vehicles, mobile artillery, and high-GVWR logistics platforms.

The “H” designation signifies the horizontal orientation, allowing seamless integration into low-profile hull designs without compromising drivetrain capability. This layout is ideal for combat vehicles where ground clearance and center of gravity are critical design constraints. The S9810H maintains Allison’s legacy of reliability by combining a 6-speed planetary gear system, a high-capacity torque converter, and electronically managed shifting, optimized for heavy payloads and unpredictable battlefield terrain.

Built for continuous high-torque demand, the S9810H supports vehicle weights above 180,000 lbs, offering robust performance in the most demanding off-road and tactical applications. With military-grade durability, advanced thermal management, and service-friendly modular design, the S9810H is an ideal solution for today’s mission-critical tracked vehicle programs.

Key Benefits of the S9810H Transmission

• Horizontal layout supports integration in compact, low-profile armored platforms
• Delivers maximum torque and durability for the most extreme tracked vehicle demands
• Proven reliability in global military and tactical engineering fleets
• Adaptive electronic shift management improves performance and fuel efficiency
• Modular, service-friendly design reduces downtime and life cycle costs
• Built to endure extreme terrain, high heat, heavy load, and continuous-duty operation

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Technical Specifications:

• Model: S9810H
• Series: Allison Specialty “S” Series
• Transmission Type: Fully automatic planetary transmission
• Mounting Orientation: Horizontal (low-profile configuration for armored and engineering vehicles)
• Speeds: 6 forward, 1 reverse
• Torque Converter: Heavy-duty hydrodynamic converter with lock-up clutch
• 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), dependent on application
• Primary Applications:
  • Armored combat and support vehicles
  • Tracked bridge-laying and earthmoving vehicles
  • Self-propelled artillery and launcher platforms
  • Tactical transport and logistics carriers
• Retarder: Not included (available in S9810HR or S9810AR variants)
• Cooling System:
  • High-efficiency oil cooling required
  • Compatible with oil-to-air or oil-to-water heat exchanger systems
• Lubrication System:
  • Full-pressure circulation system with multi-stage filtration
• Oil Specification: TES-295 or TES-668 synthetic transmission fluid
• Electronic Controls:
  • Allison Transmission Control Module (TCM)
  • Terrain-adaptive shift scheduling
  • Programmable via Allison DOC® software for diagnostic and service support
• Diagnostics & Monitoring:
  • Real-time monitoring of temperature, clutch engagement, and fluid health
  • Built-in fault logging and service interval tracking
• PTO Capability: Optional based on configuration
• Dry Weight: Approx. 2,300–2,500 lbs (1,043–1,134 kg)
• Construction Features:
  • Reinforced cast housing designed for extreme structural loads
  • Modular layout for rapid field service and component replacement
  • Vibration-, moisture-, and EMI-resistant electronics for battlefield durability