Allison S9610A

The Allison S9610A is a high-performance, fully automatic transmission engineered for the most demanding heavy tracked vehicle applications. As part of Allison’s Specialty “S” Series, the S9610A is purpose-built to deliver maximum torque capacity, seamless power transfer, and unmatched reliability in extreme-duty military and combat engineering environments.

This transmission is equipped with a 6-speed planetary gearset, one reverse gear, and a robust torque converter with lock-up clutch, allowing for smooth acceleration, efficient fuel use, and sustained drivability under full payloads and harsh terrain. The “A” designation identifies this as the baseline automatic configuration, without integrated retarder or specialty mounting adaptations—ideal for systems that rely on external braking or simpler mechanical integration.

Its horizontal mount layout is designed for space optimization in low-profile vehicle platforms, making it an ideal fit for heavy tracked vehicles such as armored bridge layers, combat recovery vehicles, mobile artillery, and military transport systems that operate under high GVW and in harsh, unpredictable field conditions.

Key Benefits of the S9610A Transmission

• Maximum torque and durability for the heaviest tracked vehicle platforms
• Simplified, robust design suited for military and extreme-duty applications
• Horizontal mounting allows compact fit within armored chassis designs
• High-capacity torque converter improves efficiency and load handling
• Military-proven architecture with modular serviceability and diagnostics
• Field-tested performance in rugged, high-GVWR operations

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Technical Specifications:

• Model: S9610A
• Series: Allison Specialty “S” Series
• Transmission Type: Fully automatic planetary transmission
• Mounting Orientation: Horizontal
• Speeds: 6 forward, 1 reverse
• Torque Converter: Hydrodynamic with lock-up clutch
• Maximum Input Torque: Up to 2,800 lb-ft (3,796 Nm)
• Gross Vehicle Weight Rating (GVWR): 130,000–160,000+ lbs (59,000–72,500+ kg), application dependent
• Primary Applications:
  • Tracked armored bridge-laying vehicles
  • Heavy mobile artillery platforms
  • Military recovery and engineering support vehicles
  • Tactical logistics and transport tracked vehicles
• Retarder: Not included (available in “AR” variant)
• Cooling System:
  • External oil-to-air or oil-to-water required
  • High-capacity fluid cooling for extreme environments
• Lubrication System:
  • Pressurized full-flow with multi-stage filtration
• Oil Specification: TES-295 or TES-668 synthetic transmission fluid
• Electronic Controls:
  • Allison Transmission Control Module (TCM)
  • Adaptive shift scheduling for terrain/load optimization
  • Integrated fault protection and shift logic management
• Diagnostics Compatibility:
  • Fully compatible with Allison DOC® software suite
  • Monitoring of clutch performance, oil life, and fault codes
• PTO Capability: Optional based on integration design
• Dry Weight: Approx. 2,000–2,200 lbs (907–998 kg), depending on configuration
• Durability Features:
  • Military-grade cast housing and hardened gearsets
  • Modular design for rapid field maintenance and service
  • Rated for continuous operation in extreme temperature and terrain conditions
  • Corrosion-resistant components and sealed electronic connectors