The 10R80 transmission found in your 2017-2020 Ford Raptor 3.5L EcoBoost may be new to the scene, but it's proving capable of handling the power of the Raptor. As with any newly developed product, however, time and mileage tend to reveal any shortcomings. One major weak point of the 10R80 is the factory-equipped thermal bypass valve. This valve controls transmission fluid flow to the external cooler, and many reports of failures are beginning to surface. In these cases, the factory valve is malfunctioning by restricting or eliminating flow to the external cooler, which quickly results in high fluid temps, damaged transmissions, and an array of warnings on your dashboard. To protect your truck from potential transmission damage, the bright minds at Mishimoto have developed a direct-fit full-flow thermal bypass valve kit for your 2017-2020 Ford Raptor. The Mishimoto thermal bypass valve kit includes an all-aluminum CNC-machined housing that replaces the stock unit. This full-flow valve allows fluid to pump through the cooler as soon as the truck is started, eliminating the potential failure point of the stock bypass, and providing cooling benefits. The full-flow design is very beneficial to vehicles operating in hot climates, extreme driving conditions, or towing heavy loads.