The Allison transmission is a vital component of your L5P Duramax, tasked with handling immense torque from your V8 diesel engine. This power generates a significant amount of heat, and if that heat isn't properly managed, it can lead to transmission failure. While the stock transmission cooler does its job, it relies on the fluid reaching it in the first place.
The factory cooling system in the Allison 1000 transmission includes an in-line thermal bypass valve that controls fluid flow to the cooler, keeping fluid from circulating until it reaches operating temperature. Unfortunately, the thermostat inside this valve is known to fail, which can prevent the fluid from ever reaching the cooler, leading to overheating. To combat this, Mishimoto has developed a high-performance thermal bypass valve upgrade for your 2017+ Chevrolet/GMC 6.6L Duramax.
Our CNC-machined aluminum thermal bypass valve not only enhances durability and appearance but also offers superior performance. The kit includes a fully serviceable thermostat for rapid warm-up in colder climates, ensuring your transmission fluid reaches optimal temperature quickly. Additionally, the kit features a thermostat bypass option, ideal for those in warmer climates or drivers in extreme towing or driving conditions, providing constant cooling for the transmission.
The Mishimoto thermal bypass valve has precision-engineered internal passages to improve fluid flow over the stock unit for better cooling efficiency, with added cooling fins for extra heat dissipation. Built to endure the harshest conditions, this thermal bypass valve kit is finished in black anodizing and, like all Mishimoto products, comes with our signature Mishimoto Lifetime Warranty.
- Local Pickup Available:
- No
- Local Delivery Available:
- No
- Additional Handling:
- No
