Allison M6610AR

The Allison M6610AR transmission is a military-grade, heavy-duty automatic transmission equipped with an integrated hydraulic retarder—designed to meet the highest demands in powertrain performance, braking control, and reliability. As a variant of the Allison 6000 Series, the M6610AR is engineered for use in extremely heavy, high-output vehicles operating in rugged off-road, military, or industrial environments. With six forward speeds, one reverse, and a lock-up torque converter, this transmission delivers efficient power transfer, exceptional torque handling, and smooth, electronically managed shifts under intense load conditions. The integrated retarder provides substantial supplemental braking force, reducing reliance on service brakes and enhancing safety on long descents or in tactical mobility situations. Built for 100,000+ lb GVWR platforms, the M6610AR is a proven solution in applications where both braking support and durability are mission-critical.

Why Choose the M6610AR

• Heavy-duty braking assistance reduces brake wear and increases vehicle control
• Reliable performance under extreme heat, load, and terrain conditions
• Fully automatic, electronically managed shifting improves driver efficiency
• Trusted in military and specialty vehicles worldwide for logistics and mobility
• Extended service life and reduced total cost of ownership in fleet applications

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Technical Specifications:

• Model: M6610AR
• Series: Allison 6000 Series
• Type: Fully automatic planetary transmission with integrated hydraulic retarder
• Number of Speeds: 6 forward, 1 reverse
• Retarder: Integral hydraulic retarder for sustained auxiliary braking
• Torque Converter: Lock-up type for maximum power efficiency
• Maximum Input Torque: Up to 1,850 lb-ft (2,500 Nm)
• Gross Vehicle Weight (GVWR): Rated for 100,000+ lbs (45,359+ kg), depending on configuration
• Applications:
  • Military tank transporters and tactical vehicles
  • Extreme-duty off-road and construction equipment
  • Mining and heavy haul vehicles requiring sustained braking capability
• Input Speed: Up to 3,300 RPM
• Cooling Requirements: High-capacity external oil cooler required due to retarder heat generation
• Lubrication System: Pressure-fed with integrated filtration
• Oil Specification: Allison TES-295 or TES-668 synthetic ATF
• PTO Capability: Available (side and/or rear configurations)
• Diagnostics: Allison DOC® compatible, supports real-time monitoring and fault codes
• Mounting Interface: SAE #1 bell housing standard
• Weight (Dry): Approximately 1,350–1,450 lbs (612–658 kg), depending on configuration
• Output Retarder Braking Torque: Approx. 1,800–2,400 lb-ft (varies with application and speed)
• Integrated Features:
  • Load-sensitive adaptive shifting
  • Safety shift inhibition logic
  • Programmable electronic controls
  • Optional prognostic maintenance support