Allison S6610HR Transmission

Allison S6610HR Transmission – Remanufactured

The Allison S6610HR transmission is a high-capacity, fully automatic system engineered for heavy-duty tracked military and tactical vehicles that demand maximum driveline control, advanced braking capability, and high input torque tolerance. A member of the ruggedized “S” Series from Allison Transmission, the S6610HR combines the proven performance of the S6610H model with the integration of a hydraulic retarder — denoted by the “R” suffix — to provide enhanced braking control and thermal management during prolonged high-load operations or steep descents.

This 6-speed, horizontally mounted transmission is ideal for combat and engineering platforms that operate in extreme environments where braking performance and drivetrain preservation are mission-critical. With a torque converter featuring lock-up clutch, advanced electronic control modules, and terrain-adaptive shift logic, the S6610HR offers smooth gear transitions, real-time diagnostics, and seamless integration into advanced armored vehicle systems. It is particularly suited for tracked vehicles requiring integrated braking support, such as bridge layers, armored recovery vehicles, and self-propelled artillery.

Key Benefits of the S6610HR Transmission

• Integrated hydraulic retarder improves vehicle braking safety and reduces wear on service brakes
• High torque capacity for large, heavy tracked vehicles in extreme conditions
• Advanced electronic controls improve efficiency, shift smoothness, and driveline protection
• Horizontal layout optimizes space in armored hulls and engineering platforms
• Proven reliability in military, tactical, and engineering support vehicles

Technical Specifications:

• Model: S6610HR
• Series: Allison Specialty “S” Series
• Type: Fully automatic planetary transmission with hydraulic retarder
• Mounting Orientation: Horizontal
• Speeds: 6 forward, 1 reverse
• Torque Converter: Hydrodynamic with lock-up clutch
• Integrated Retarder: Yes
• Max Input Torque: Up to 2,250 lb-ft
• GVW: 90,000–130,000+ lbs
• Cooling: External oil-to-air or oil-to-water system
• Lubrication: Pressurized with full-flow filtration
• Oil Spec: TES-295 or TES-668
• TCM: Yes with adaptive programming
• Diagnostics: Allison DOC® compatible
• PTO: Optional
• Dry Weight: Approx. 1,750–1,850 lbs