Guardian 450HP 6R140 Towing Transmission with Converter

• Reinforced for long-lasting performance
• Stronger engagement and better torque handling
• More clutch plates for improved holding capacity
• Ensures optimal fluid circulation and cooling
• Keeps transmission fluid clean for extended lifespan

Unmatched Towing Performance & Reliability

The SunCoast Guardian 450HP 6R140 Towing Transmission is the ultimate solution for 2017-2019 Ford 6.7L Powerstroke owners who demand superior durability and performance. Designed to handle the intense stresses of heavy towing and hauling, this transmission enhances reliability and longevity, ensuring your truck operates at peak efficiency even under extreme loads. Unlike stock transmissions, the Guardian 6R140 features upgraded clutch packs, custom pistons, and reinforced internal components, providing smooth, precise shifts and increased holding power. Whether you're pulling a trailer, hauling equipment, or working in extreme conditions, this transmission delivers uncompromising strength and reliability for the toughest jobs.

Built Tough for Heavy-Duty Work

Engineered with advanced clutch technology and reinforced components, the Guardian 6R140 Transmission is a massive upgrade over stock. It features all-new Carbon Graphitic clutches and custom-machined steels, ensuring increased heat resistance and durability. The heavy-duty 4-5-6 overdrive clutch pack has been upgraded with an increased clutch count and a custom-machined overdrive apply piston, providing stronger engagement and improved torque handling. Additionally, new bushings, a new transmission pump, and a high-quality filter ensure optimized fluid flow and consistent performance. These enhancements not only extend the lifespan of your transmission but also provide a seamless, factory-like driving experience with improved efficiency.

SunCoast High-Performance Torque Converter

The Guardian HD transmission includes SunCoast’s high-performance torque converter, which is a major improvement over the factory unit. Ford’s stock torque converter was designed to soften the impact of the 6.7L Powerstroke’s massive torque output, but SunCoast takes it even further by integrating a long-travel, ultra-high-capacity turbine damper for maximum torque absorption and smooth power delivery. With a variety of stall speeds available, this torque converter improves throttle response, reduces slippage, and increases efficiency—allowing you to put more power to the ground with less wasted energy. Whether you're towing up steep grades or cruising on the highway, this heavy-duty torque converter ensures rock-solid performance and reliability.

• $2,750 core charge applies.