The 10R80 transmission found in your 2017+ Raptor 3.5L EcoBoost may be new to the scene, but it's proving capable of handling the power of the potent 3.5L. 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 thermostatic bypass valve kit for your 2017+ Ford Raptor. The Mishimoto thermal bypass valve kit includes an all-aluminum CNC-machined housing that replaces the stock unit. This thermal bypass unit includes a fully serviceable 160F thermostat, providing optimal fluid temperatures for all driving conditions. For those in warm climates or vehicles being used in extreme driving/towing conditions, this kit also includes a bypass assembly that provides full flow to the transmission cooler, regardless of temperature. The Mishimoto thermal bypass valve kit helps extend the life of your 10R80 transmission and effectively eliminates the risk of overheating due to stock bypass valve failure. As with all our products, this kit includes the Mishimoto Lifetime Warranty.