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Optimize Your L5P Duramax Transmission Cooling

The Allison transmission in your 6.6L Duramax L5P is a powerhouse, but it generates significant heat. Proper cooling is essential to prevent damage. The Mishimoto Transmission Thermal Bypass Valve Kit is designed to ensure your transmission fluid reaches the cooler efficiently, especially crucial for 2017 and newer GMC Sierra 2500/3500 HD and Chevrolet Silverado 2500/3500 HD models with the L5P engine.

Intelligent Fluid Temperature Control

The stock cooling system relies on an in-line thermal bypass valve to regulate fluid flow to the transmission cooler. This valve is designed to keep fluid from reaching the cooler until it reaches optimal operating temperature, aiding in faster warm-ups. However, the thermostat within the stock valve is prone to failure, often sticking closed and preventing fluid flow to the cooler altogether, leading to overheating. This Mishimoto kit replaces the failure-prone stock valve with a reliable unit, ensuring consistent fluid flow to your transmission cooler when it's needed most.

• Prevents Overheating: Ensures transmission fluid flows to the cooler.
• Direct Replacement: Designed to fit 2017+ GMC 6.6L Duramax L5P applications.
• Reliable Operation: Replaces the failure-prone stock thermal bypass valve.
• Optimized Warm-up: Allows for efficient fluid warming before engaging the cooler.
• Durable Construction: Built to withstand the demanding conditions of diesel trucks.

Don't let a faulty bypass valve compromise your transmission. Upgrade to the Mishimoto Thermal Bypass Valve Kit for reliable temperature management and extended transmission life.

Get the best in diesel cooling performance from Mishimoto.