Allison S8610H

The Allison S8610H is a high-performance, fully automatic transmission engineered for extremely heavy tracked vehicles and specialized military equipment. Designed to support the most demanding combat and engineering operations, the S8610H is part of Allison’s advanced Specialty “S” Series and is optimized for applications requiring exceptional torque capacity, horizontal installation, and reliable driveline control under sustained heavy loads.

The “H” suffix designates a horizontal mounting orientation, ideal for vehicles with low-profile armored hulls or space-constrained engine compartments. With six forward speeds, one reverse, and a robust hydrodynamic torque converter with lock-up clutch, the S8610H provides smooth power delivery, efficient gear transitions, and outstanding durability across a wide range of terrain types. It is a preferred choice for combat recovery vehicles, self-propelled artillery, and heavy combat engineering platforms due to its unmatched strength, modularity, and battlefield-proven design.

Key Benefits of the S8610H Transmission

• One of the most robust horizontal automatic transmissions in the Allison lineup
• Superior torque handling for extremely heavy military and industrial tracked vehicles
• Proven field reliability under combat and engineering stress conditions
• Horizontal layout maximizes space efficiency in low-profile hulls
• Advanced electronics improve vehicle performance, safety, and maintainability

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Technical Specifications:

• Model: S8610H
• Series: Allison Specialty “S” Series
• Transmission Type: Fully automatic planetary transmission
• Mounting Orientation: Horizontal (low-profile for compact integration)
• Number of Speeds: 6 forward, 1 reverse
• Torque Converter: Heavy-duty hydrodynamic torque converter with lock-up clutch
• Maximum Input Torque: Up to 2,500 lb-ft (3,390 Nm)
• Gross Vehicle Weight Rating (GVWR): 120,000–150,000+ lbs (54,400–68,000+ kg), application dependent
• Primary Applications:
  • Heavy tracked combat vehicles
  • Self-propelled artillery systems
  • Armored recovery and bridge-laying vehicles
  • Military engineering equipment requiring sustained torque output
• Cooling Requirements:
  • External oil-to-air or oil-to-water cooling system mandatory
• Lubrication System: Pressurized full-flow system with high-efficiency filtration
• Oil Specification: TES-295 or TES-668 synthetic transmission fluid
• Electronic Controls:
  • Allison TCM (Transmission Control Module)
  • Adaptive shift scheduling based on terrain and load
  • Built-in protection features: shift inhibition, overheating prevention, diagnostics
• Diagnostics Compatibility:
  • Fully compatible with Allison DOC® diagnostic software
  • Monitors oil life, clutch condition, and fault codes
• PTO Capability: Optional, depending on application integration
• Dry Weight: Approx. 1,800–2,000 lbs (816–907 kg), depending on configuration
• Additional Features:
  • Modular architecture for fast maintenance and component replacement
  • Ruggedized housing and internal components for high-shock environments
  • Designed to meet or exceed military vehicle durability standards
  • Supports extended operations under extreme heat, cold, and terrain stress