Mishimoto Thermal Bypass Valve Kit CNC Aluminum

2013–2018 Dodge Ram 2500 / 3500 6.7L Diesel

Part #: MMTC-RAM-TBV

Overview

The Mishimoto Thermal Bypass Valve Kit is a precision-engineered upgrade designed specifically for 2013–2018 Dodge Ram 2500 and Ram 3500 trucks equipped with the 6.7L Cummins diesel engine. This essential component regulates the flow of transmission fluid to the cooler, ensuring the transmission maintains optimal operating temperatures and preventing overheating during demanding conditions.

Built for Ram owners who prioritize reliability and enhanced cooling performance, this valve replaces the factory thermal bypass valve with a more durable and efficient solution. By enabling transmission fluid to reach the cooler sooner and more consistently, the Mishimoto valve helps extend transmission life, especially under heavy towing loads, extreme climates, or rigorous daily use.

Key Features

This Thermal Bypass Valve Kit offers significant improvements over the stock valve, combining advanced functionality with robust construction:

• Direct-fit replacement for 2013–2018 Dodge Ram 2500 and 3500 6.7L Cummins transmissions (compatible with 68-RFE and Aisin AS69RC models)
• Includes a fully serviceable, replaceable thermostat that opens approximately 10°F earlier than the factory valve for faster warm-up and improved cooling efficiency
• Durable CNC-machined aluminum valve body with a black anodized finish for superior corrosion resistance and long-lasting durability
• Enhanced fluid flow in both thermostat and bypass modes to maximize transmission cooling performance
• Interchangeable thermostat bypass fitting allows full fluid flow to the cooler regardless of temperature, ideal for hot climate operation
• Integrated cooling fins machined into the valve body increase heat dissipation to maintain optimal fluid temperatures
• Backed by the Mishimoto Lifetime Warranty for reliability and customer confidence

Construction & Design

The Mishimoto Thermal Bypass Valve is crafted from high-quality CNC-machined aluminum, providing exceptional strength and excellent thermal conductivity. Its black anodized finish protects against corrosion, ensuring the valve withstands harsh engine bay environments and heavy-duty use.

The valve features a fully serviceable internal thermostat designed for enhanced durability compared to the factory unit, reducing the risk of failure that can lead to transmission overheating. Precision-machined cooling fins increase the surface area for improved heat dissipation, helping maintain stable transmission fluid temperatures even under demanding conditions.

Additionally, the design allows for easy swapping of the thermostat bypass fitting, enabling customization for seasonal or climate-specific needs without complicated modifications.

Installation & Fitment

The Mishimoto Thermal Bypass Valve Kit is a direct-fit replacement for the factory thermal bypass valve on 2013–2018 Dodge Ram 2500 and Ram 3500 trucks equipped with the 6.7L Cummins engine. Installation requires no permanent modifications and can be completed using basic hand tools, typically a wrench.

The kit’s design ensures a straightforward swap, minimizing downtime and effort while restoring or improving your transmission cooling system’s performance.

What's Included

• Mishimoto CNC-machined aluminum thermal bypass valve body with integrated cooling fins
• Fully serviceable, replaceable 160°F thermostat
• Thermostat bypass fitting for constant cooling option
• Installation hardware and seals
• Detailed installation instructions

Ideal For

This Thermal Bypass Valve Kit is ideal for Dodge Ram 2500 and 3500 owners who frequently tow heavy loads, operate in extreme temperatures, or want to enhance the longevity and reliability of their transmission. It is especially beneficial for drivers in hot climates who require consistent transmission cooling and those seeking a durable, serviceable upgrade over the factory valve to prevent costly transmission damage.

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.