Allison S8610M

The Allison S8610M is a heavy-duty, fully automatic transmission designed for use in ultra-high GVW tracked military and combat support vehicles that require maximum torque transfer, battlefield-grade durability, and intelligent drivetrain control. As part of Allison’s elite Specialty “S” Series, the S8610M represents the military-optimized variant of the S8610H, offering a horizontal mount configuration ideal for armored hulls and space-constrained platforms.

This 6-speed planetary transmission is engineered to handle extreme torque loads, harsh terrains, and long mission cycles under full payloads. The “M” designation indicates a model tailored for military use, with reinforced components, modular servicing capability, and enhanced integration flexibility. Equipped with a torque converter and lock-up clutch, adaptive shift controls, and battle-proven reliability, the S8610M is the backbone of many heavy tracked vehicle powertrains across global defense fleets.

Whether operating in deserts, snow, or mountainous terrain, the S8610M delivers power, dependability, and ease of serviceability, making it the go-to choice for heavy armored engineering vehicles, artillery platforms, and tactical transports.

Key Benefits of the S8610M Transmission

• High-torque capacity for the heaviest tracked combat and engineering platforms
• Military-specific enhancements for mission-critical performance
• Horizontal layout allows for efficient packaging in armored vehicle hulls
• Intelligent electronics optimize shifting and drivetrain longevity
• Simplified service with modular construction and built-in diagnostics
• Field-proven performance in global military applications under extreme conditions

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Technical Specifications:

• Model: S8610M
• Series: Allison Specialty “S” Series
• Transmission Type: Fully automatic planetary transmission
• Mounting Orientation: Horizontal (compact profile for low-silhouette military vehicles)
• Number of Speeds: 6 forward, 1 reverse
• Torque Converter: Heavy-duty hydrodynamic unit 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:
  • Tracked military recovery and engineering vehicles
  • Armored bridge-layers
  • Self-propelled artillery and tank-based utility platforms
  • Heavy tactical support and logistic tracked systems
• Retarder: Not included (available on “HR” variant)
• Cooling Requirements:
  • External oil-to-air or oil-to-water heat exchanger
• Lubrication System: Internal pressure-fed with high-efficiency filtration
• Oil Specification: Allison-approved TES-295 or TES-668 synthetic ATF
• Electronic Controls:
  • Integrated Allison TCM (Transmission Control Module)
  • Load- and terrain-adaptive shift programming
  • Engine/transmission coordination logic
• Diagnostics Compatibility:
  • Fully compatible with Allison DOC® software
  • Monitoring for clutch life, fluid condition, and system faults
• PTO Capability: Optional, depending on application integration
• Dry Weight: Approx. 1,800–2,000 lbs (816–907 kg), depending on configuration
• Durability Features:
  • Military-spec housing and internal gearing
  • Modular design for field-replaceable subassemblies
  • Sealed electronics and rugged connectors for harsh environments
  • Extended operating lifespan under sustained high loads