Full-Flow Thermal Bypass Valve Kit, fits Chevrolet/GMC 6.6L Duramax L5P 17-19 - Mishimoto - MMTC-L5P-TBVFF

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 2017-2019 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 adds even more heat dissipation. This 2017-2019 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.
Installs in less than 1 hour
Eliminates failure-prone bypass valve
Durable CNC-machined billet-aluminum construction
Install Difficulty: 1
Prop 65 - Short Label: WARNING: Cancer and Reproductive Harm - www.p65warnings.ca.gov
Prop 65 Y/N: Y
SellingPoint01: Direct fit for 2017-2019 Chevrolet/GMC 6.6L Duramax L5P
SellingPoint02: Installs in less than 1 hour
SellingPoint03: Eliminates failure-prone bypass valve
SellingPoint04: Durable CNC-machined billet-aluminum construction
SellingPoint05: Full-flow bypass allows the transmission cooler to operate at maximum efficiency
SellingPoint06: Helps extend transmission life and prevent overheating
SellingPoint07: Fits with stock transmission cooler piping requiring no modification for installation
SellingPoint08: Integrated heat-sink fins provide unique styling and added heat dissipation
SellingPoint09: Durable anodized finish
SellingPoint10: Mishimoto Lifetime Warranty
SellingPoint11: N/A
SellingPoint12: N/A
SellingPoint13: N/A
SellingPoint14: N/A
SellingPoint15: N/A
TechSpec Applications: GMC Sierra 2500HD V8 (6.6L Diesel) 2017-2019--GMC Sierra 3500HD V8 (6.6L Diesel) 2017-2019--Chevrolet Silverado 2500HD V8 (6.6L Diesel) 2017-2019--Chevrolet Silverado 3500HD V8 (6.6L Diesel) 2017-2019
TechSpec Chassis Codes: 2500--3500
TechSpec Engine Codes: L5P--6.6L Duramax
TechSpec Includes: (1) CNC-Machined Billet Aluminum Thermal Bypass Valve--(2) 7/8-inch X 14 Quick-Disconnect Transmission Line Fittings--(1) Transmission Line Mounting Plate--(1) Transmission Line Mounting Plate Bolt--Mishimoto Lifetime Warranty
TechSpec Mishimoto Activation Temperature (F): N/A
TechSpec Note: Mishimoto does not recommend customers in cold climates install the thermostat bypass to avoid overcooling of the transmission fluid----This performance thermostatic bypass valve only fits vehicles equipped with the Allison automatic transmission----
TechSpec OEM Activation Temperature (F): 185