Allison S5610NR

The Allison S5610NR is a high-performance, fully automatic transmission engineered for use in tracked military and heavy-duty off-road vehicles, specifically tailored for platforms where braking control, reliability, and torque management are mission-critical. As a variant of the proven S5610 platform, the “NR” designation stands for “No Retarder”, meaning it delivers all the torque-handling and shift-performance benefits of the S5610 family without the added braking system, making it ideal for applications where external braking systems are employed or where space constraints and cooling demands preclude the use of a hydraulic retarder.

With six forward speeds, one reverse, and a lock-up torque converter, the S5610NR offers smooth, intelligent gear transitions and optimal fuel economy across varied terrains. Its horizontal mounting configuration allows for installation in low-profile armored vehicle hulls, while the full electronic control module provides adaptive shifting, diagnostics, and driveline protection. Designed for vehicles weighing up to 90,000 lbs, the S5610NR is ideally suited for armored personnel carriers (APCs), combat engineering vehicles, and tracked recovery vehicles that prioritize power-to-weight efficiency and control.

Key Benefits of the S5610NR Transmission

• Ideal for tracked vehicles that utilize separate braking systems
• Simplified architecture with lower cooling and space requirements
• Same torque capacity and gear performance as retarder-equipped models
• Proven performance in global defense and tactical vehicle fleets
• Supports modern electronics, diagnostics, and drivetrain protection systems

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Technical Specifications:

• Model: S5610NR
• Series: Allison Specialty “S” Series
• Type: Fully automatic planetary transmission without retarder
• Application Type: Tracked military/off-road vehicles
• Number of Speeds: 6 forward, 1 reverse
• Torque Converter: Heavy-duty hydrodynamic torque converter with lock-up clutch
• Retarder: None (NR = No Retarder variant)
• Mounting Orientation: Horizontal configuration for compact integration
• Maximum Input Torque: Up to 2,000 lb-ft (2,711 Nm)
• Gross Vehicle Weight Rating (GVWR): 60,000–90,000+ lbs (27,200–40,800+ kg), application dependent
• Applications:
  • Armored personnel carriers (APCs)
  • Tracked combat support and utility vehicles
  • Engineering and mine-clearing vehicles
  • Tactical tracked systems using external braking systems
• Cooling System: External oil-to-air or oil-to-water cooler required
• Lubrication System: Full-pressure internal with high-capacity filtration
• Oil Specification: Allison-approved TES-295 or TES-668 synthetic ATF
• Electronic Controls:
  • Allison Transmission Control Module (TCM) with programmable shift logic
  • Terrain-adaptive shift strategies
  • Safety features including shift inhibition and diagnostics
• Diagnostics: Compatible with Allison DOC® software and military vehicle interface systems
• PTO Capability: Available in some configurations
• Dry Weight: Approx. 1,300–1,450 lbs (590–658 kg)
• Special Features:
  • Modular construction for ease of service and maintenance
  • Optimized for low-profile combat vehicle installations
  • Durable under extreme thermal, mechanical, and terrain stress
  • Integrated monitoring of oil condition and clutch life