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Make 4 interest-free payments of $59.59 fortnightly and receive your order now. More info
The Allison transmission is the backbone of your L5P Duramax. It's responsible for transmitting large quantities of torque from your V8 diesel powerplant. This torque generates a lot of heat, and if that heat isn't dissipated, it can destroy your transmission. The transmission cooler does a good job of keeping trans fluid temperatures in check, but only if the fluid can reach it. The stock cooling system of the Allison 1000 transmission utilizes an in-line thermal bypass valve that controls fluid flow to the transmission cooler. The purpose of this valve is to prevent transmission fluid from flowing to the cooler until it reaches operating temperature. The thermostat inside this valve is prone to failure, however, and when that happens, the fluid never flows to the cooler, and the transmission can overheat. That's why Mishimoto has developed a full-flow thermal bypass valve upgrade for your 2017+ Chevrolet/GMC 6.6L Duramax. Our CNC-machined aluminum full-flow thermal bypass valve not only looks better than the stock unit, but it performs better too. This Mishimoto thermal bypass valve eliminates the internal thermostat, providing full fluid flow to the transmission cooler in all running conditions. This setup is ideal for owners in warm climates, those performing heavy towing, and trucks needing the best possible cooling efficiency for their transmission. The Mishimoto thermal bypass valve features strategically machined internal passages, providing improved flow over the stock valve for more effective cooling. In addition, cooling fins machined into the valve body add even more heat dissipation. This 2017+ Chevrolet/GMC 6.6L Duramax L5P Full-Flow Thermal Bypass Valve Kit is built to last a lifetime with a durable black anodized finish and our Mishimoto Lifetime Warranty.
Full-Flow Transmission Thermal Bypass Valve Kit, fits Chevrolet/GMC 6.6L Duramax L5P 2017+
Automatic Transmission Oil Cooler
Mishimoto is a leading manufacturer of performance cooling products for the automotive aftermarket. Founded in 1999, Mishimoto has a long history of innovation and performance, and is known for its high-quality products and customer service.
Mishimoto products are designed to improve the cooling performance of your vehicle, which can lead to increased horsepower, better fuel economy, and a longer engine life. Mishimoto's lineup of products includes everything from radiator hoses and water pumps to intercoolers and oil coolers.
In addition to its cooling products, Mishimoto also offers a line of high-performance accessories, such as air intakes, exhaust systems, and strut bars. Mishimoto's accessories are designed to improve the performance and handling of your vehicle.
Mishimoto is committed to providing its customers with the best possible products and service. All Mishimoto products are backed by a comprehensive warranty, and Mishimoto's customer service department is always available to answer questions and provide assistance.
If you're looking for a performance upgrade for your vehicle, look no further than Mishimoto. Mishimoto products are the best way to improve the cooling performance, performance, and handling of your vehicle.
Here are some of the benefits of choosing Mishimoto products:
If you're looking for a performance upgrade for your vehicle, I highly recommend Mishimoto products.
Brand | Mishimoto |
Manufacturer's Part Number | MMTC-L5P-TBVFF |
Part Type | Fluid Coolers |
Summit Racing Part Number | MIO-MMTCL5PTBVFF |
UPC | 00840197710609 |
Mishimoto 2017+ GMC 6.6L Duramax L5P Transmission Thermal Bypass Valve Kit | ||||
---|---|---|---|---|
Year | Make | Model | Submodel | Region |
2017 | GMC | Sierra 3500 HD | SLT | US |
2017 | Chevrolet | Silverado 2500 HD | WT | US |
2017 | Chevrolet | Silverado 3500 HD | LT | US |
2017 | Chevrolet | Silverado 2500 HD | LT | US |
2017 | Chevrolet | Silverado 3500 HD | LTZ | US |
2017 | GMC | Sierra 2500 HD | Denali | US |
2017 | Chevrolet | Silverado 2500 HD | High Country | US |
2017 | GMC | Sierra 2500 HD | Base | US |
2017 | Chevrolet | Silverado 3500 HD | High Country | US |
2017 | GMC | Sierra 2500 HD | SLT | US |
2017 | GMC | Sierra 3500 HD | Base | US |
2017 | Chevrolet | Silverado 2500 HD | LTZ | US |
2017 | GMC | Sierra 3500 HD | SLE | US |
2017 | Chevrolet | Silverado 3500 HD | WT | US |
2017 | GMC | Sierra 2500 HD | SLE | US |
2017 | GMC | Sierra 3500 HD | Denali | US |
2018 | GMC | Sierra 3500 HD | Denali | US |
2018 | GMC | Sierra 3500 HD | Base | US |
2018 | GMC | Sierra 2500 HD | Base | US |
2018 | GMC | Sierra 2500 HD | Denali | US |
2018 | Chevrolet | Silverado 3500 HD | LT | US |
2018 | GMC | Sierra 2500 HD | SLE | US |
2018 | Chevrolet | Silverado 2500 HD | High Country | US |
2018 | GMC | Sierra 2500 HD | SLT | US |
2018 | Chevrolet | Silverado 2500 HD | LT | US |
2018 | Chevrolet | Silverado 3500 HD | WT | US |
2018 | Chevrolet | Silverado 3500 HD | High Country | US |
2018 | Chevrolet | Silverado 3500 HD | LTZ | US |
2018 | GMC | Sierra 3500 HD | SLT | US |
2018 | Chevrolet | Silverado 2500 HD | LTZ | US |
2018 | Chevrolet | Silverado 2500 HD | WT | US |
2018 | GMC | Sierra 3500 HD | SLE | US |
2019 | Chevrolet | Silverado 2500 HD | LT | US |
2019 | GMC | Sierra 3500 HD | SLT | US |
2019 | Chevrolet | Silverado 3500 HD | High Country | US |
2019 | Chevrolet | Silverado 2500 HD | WT | US |
2019 | Chevrolet | Silverado 3500 HD | LT | US |
2019 | GMC | Sierra 3500 HD | SLE | US |
2019 | GMC | Sierra 2500 HD | Base | US |
2019 | GMC | Sierra 2500 HD | SLE | US |
2019 | GMC | Sierra 3500 HD | Base | US |
2019 | GMC | Sierra 2500 HD | Denali | US |
2019 | GMC | Sierra 3500 HD | Denali | US |
2019 | Chevrolet | Silverado 3500 HD | WT | US |
2019 | Chevrolet | Silverado 2500 HD | High Country | US |
2019 | Chevrolet | Silverado 2500 HD | LTZ | US |
2019 | Chevrolet | Silverado 3500 HD | LTZ | US |
2019 | GMC | Sierra 2500 HD | SLT | US |
2020 | GMC | Sierra 3500 HD | Base | US |
2020 | Chevrolet | Silverado 2500 HD | High Country | US |
Note: Over 50 fitments returned for this product, this table is trimmed to only display the first 50. |
The Allison transmission is the backbone of your L5P Duramax. It's responsible for transmitting large quantities of torque from your V8 diesel powerplant. This torque generates a lot of heat, and if that heat isn't dissipated, it can destroy your transmission. The transmission cooler does a good job of keeping trans fluid temperatures in check, but only if the fluid can reach it. The stock cooling system of the Allison 1000 transmission utilizes an in-line thermal bypass valve that controls fluid flow to the transmission cooler. The purpose of this valve is to prevent transmission fluid from flowing to the cooler until it reaches operating temperature. The thermostat inside this valve is prone to failure, however, and when that happens, the fluid never flows to the cooler, and the transmission can overheat. That's why Mishimoto has developed a full-flow thermal bypass valve upgrade for your 2017+ Chevrolet/GMC 6.6L Duramax. Our CNC-machined aluminum full-flow thermal bypass valve not only looks better than the stock unit, but it performs better too. This Mishimoto thermal bypass valve eliminates the internal thermostat, providing full fluid flow to the transmission cooler in all running conditions. This setup is ideal for owners in warm climates, those performing heavy towing, and trucks needing the best possible cooling efficiency for their transmission. The Mishimoto thermal bypass valve features strategically machined internal passages, providing improved flow over the stock valve for more effective cooling. In addition, cooling fins machined into the valve body add even more heat dissipation. This 2017+ Chevrolet/GMC 6.6L Duramax L5P Full-Flow Thermal Bypass Valve Kit is built to last a lifetime with a durable black anodized finish and our Mishimoto Lifetime Warranty.
Full-Flow Transmission Thermal Bypass Valve Kit, fits Chevrolet/GMC 6.6L Duramax L5P 2017+
Automatic Transmission Oil Cooler
Mishimoto is a leading manufacturer of performance cooling products for the automotive aftermarket. Founded in 1999, Mishimoto has a long history of innovation and performance, and is known for its high-quality products and customer service.
Mishimoto products are designed to improve the cooling performance of your vehicle, which can lead to increased horsepower, better fuel economy, and a longer engine life. Mishimoto's lineup of products includes everything from radiator hoses and water pumps to intercoolers and oil coolers.
In addition to its cooling products, Mishimoto also offers a line of high-performance accessories, such as air intakes, exhaust systems, and strut bars. Mishimoto's accessories are designed to improve the performance and handling of your vehicle.
Mishimoto is committed to providing its customers with the best possible products and service. All Mishimoto products are backed by a comprehensive warranty, and Mishimoto's customer service department is always available to answer questions and provide assistance.
If you're looking for a performance upgrade for your vehicle, look no further than Mishimoto. Mishimoto products are the best way to improve the cooling performance, performance, and handling of your vehicle.
Here are some of the benefits of choosing Mishimoto products:
If you're looking for a performance upgrade for your vehicle, I highly recommend Mishimoto products.
Brand | Mishimoto |
Manufacturer's Part Number | MMTC-L5P-TBVFF |
Part Type | Fluid Coolers |
Summit Racing Part Number | MIO-MMTCL5PTBVFF |
UPC | 00840197710609 |
Mishimoto 2017+ GMC 6.6L Duramax L5P Transmission Thermal Bypass Valve Kit | ||||
---|---|---|---|---|
Year | Make | Model | Submodel | Region |
2017 | GMC | Sierra 3500 HD | SLT | US |
2017 | Chevrolet | Silverado 2500 HD | WT | US |
2017 | Chevrolet | Silverado 3500 HD | LT | US |
2017 | Chevrolet | Silverado 2500 HD | LT | US |
2017 | Chevrolet | Silverado 3500 HD | LTZ | US |
2017 | GMC | Sierra 2500 HD | Denali | US |
2017 | Chevrolet | Silverado 2500 HD | High Country | US |
2017 | GMC | Sierra 2500 HD | Base | US |
2017 | Chevrolet | Silverado 3500 HD | High Country | US |
2017 | GMC | Sierra 2500 HD | SLT | US |
2017 | GMC | Sierra 3500 HD | Base | US |
2017 | Chevrolet | Silverado 2500 HD | LTZ | US |
2017 | GMC | Sierra 3500 HD | SLE | US |
2017 | Chevrolet | Silverado 3500 HD | WT | US |
2017 | GMC | Sierra 2500 HD | SLE | US |
2017 | GMC | Sierra 3500 HD | Denali | US |
2018 | GMC | Sierra 3500 HD | Denali | US |
2018 | GMC | Sierra 3500 HD | Base | US |
2018 | GMC | Sierra 2500 HD | Base | US |
2018 | GMC | Sierra 2500 HD | Denali | US |
2018 | Chevrolet | Silverado 3500 HD | LT | US |
2018 | GMC | Sierra 2500 HD | SLE | US |
2018 | Chevrolet | Silverado 2500 HD | High Country | US |
2018 | GMC | Sierra 2500 HD | SLT | US |
2018 | Chevrolet | Silverado 2500 HD | LT | US |
2018 | Chevrolet | Silverado 3500 HD | WT | US |
2018 | Chevrolet | Silverado 3500 HD | High Country | US |
2018 | Chevrolet | Silverado 3500 HD | LTZ | US |
2018 | GMC | Sierra 3500 HD | SLT | US |
2018 | Chevrolet | Silverado 2500 HD | LTZ | US |
2018 | Chevrolet | Silverado 2500 HD | WT | US |
2018 | GMC | Sierra 3500 HD | SLE | US |
2019 | Chevrolet | Silverado 2500 HD | LT | US |
2019 | GMC | Sierra 3500 HD | SLT | US |
2019 | Chevrolet | Silverado 3500 HD | High Country | US |
2019 | Chevrolet | Silverado 2500 HD | WT | US |
2019 | Chevrolet | Silverado 3500 HD | LT | US |
2019 | GMC | Sierra 3500 HD | SLE | US |
2019 | GMC | Sierra 2500 HD | Base | US |
2019 | GMC | Sierra 2500 HD | SLE | US |
2019 | GMC | Sierra 3500 HD | Base | US |
2019 | GMC | Sierra 2500 HD | Denali | US |
2019 | GMC | Sierra 3500 HD | Denali | US |
2019 | Chevrolet | Silverado 3500 HD | WT | US |
2019 | Chevrolet | Silverado 2500 HD | High Country | US |
2019 | Chevrolet | Silverado 2500 HD | LTZ | US |
2019 | Chevrolet | Silverado 3500 HD | LTZ | US |
2019 | GMC | Sierra 2500 HD | SLT | US |
2020 | GMC | Sierra 3500 HD | Base | US |
2020 | Chevrolet | Silverado 2500 HD | High Country | US |
Note: Over 50 fitments returned for this product, this table is trimmed to only display the first 50. |