Mishimoto Thermal Bypass Valve Kit

2013–2018 Ram 2500 / Ram 3500 6.7L Cummins

MMTC-RAM-TBVFF

Overview:

The Mishimoto Thermal Bypass Valve Kit is a critical upgrade for the transmission cooling system of your 2013–2018 Dodge Ram 2500 or Ram 3500 equipped with the 6.7L Cummins engine. Designed to replace the stock in-line thermal bypass valve, this kit ensures consistent transmission fluid flow to the cooler, eliminating the risk of overheating caused by a failing thermostat. By providing full fluid flow under all operating conditions, it enhances transmission cooling efficiency, protecting your truck’s transmission during heavy towing, high-load driving, or in warm climates.

Built for durability and performance, this valve kit is ideal for Ram owners seeking reliable transmission temperature management and long-term peace of mind.

Key Features:

The Mishimoto Thermal Bypass Valve Kit offers superior design and functionality compared to the factory valve. Key features include:

• Full-flow design that eliminates the failure-prone internal thermostat found in stock valves
• CNC-machined billet aluminum construction for strength and durability
• Strategically machined internal passages to improve transmission fluid flow and cooling efficiency
• Integrated cooling fins on the valve body to enhance heat dissipation
• Durable silver anodized finish for corrosion resistance and long-lasting appearance
• Compatible with both 68-RFE and Aisin AS69RC transmissions used in Ram 2500 and 3500 trucks
• Designed to handle up to 930 lb-ft of torque generated by the 6.7L Cummins engine
• Backed by the Mishimoto Lifetime Warranty for confidence and reliability
• Simple installation process requiring less than one hour

Construction & Design:

The valve is precision CNC-machined from billet aluminum, ensuring a robust and lightweight component that withstands the rigors of heavy-duty use. The internal passages are carefully engineered to maximize fluid flow, preventing bottlenecks that can lead to overheating. Cooling fins machined directly into the valve body increase surface area for heat dissipation, further enhancing transmission fluid temperature control. The silver anodized finish protects the valve from corrosion and wear, maintaining performance and appearance over the life of the vehicle.

Installation & Fitment:

Installation of the Mishimoto Thermal Bypass Valve Kit is straightforward and can be completed in under one hour with basic hand tools. It directly replaces the factory thermal bypass valve without requiring modifications to the transmission cooling system. This kit fits a wide range of Ram 2500 and Ram 3500 models equipped with the 6.7L Cummins engine from 2013 through 2018, including Big Horn, Laramie, Laramie Limited, Laramie Longhorn, Limited, Lone Star, Outdoorsman, Power Wagon, SLT, ST, and Tradesman trims.

What's Included:

• Mishimoto full-flow thermal bypass valve
• All necessary mounting hardware
• Installation instructions

Ideal For:

This thermal bypass valve kit is perfect for Ram 2500 and 3500 owners who demand enhanced transmission cooling performance. It is especially beneficial for:

• Drivers in warm or hot climates where transmission overheating risk is higher
• Owners who frequently tow heavy loads or haul trailers
• Enthusiasts seeking to improve transmission reliability and longevity
• Anyone looking to upgrade from the stock valve to a more durable, maintenance-free solution

Mishimoto is a performance cooling brand offering aluminum radiators, intercoolers, oil coolers, hoses, and supporting hardware built to manage heat on hard-driven street and track vehicles. For boosted setups and towing/off-road rigs alike, Mishimoto upgrades are designed to increase cooling capacity and reliability where factory systems can become a limitation.