Mishimoto Thermal Bypass Valve Kit

2013–2018 Ram 2500 / Ram 3500 6.7L Cummins

MMTC-RAM-TBV

Overview:

The Mishimoto Thermal Bypass Valve Kit is a precision-engineered upgrade designed specifically for the 2013–2018 Dodge Ram 2500 and Ram 3500 equipped with the 6.7L Cummins engine. This critical component manages the flow of transmission fluid to the cooler, ensuring optimal operating temperatures and protecting your transmission from overheating. Ideal for Ram owners who demand reliability and enhanced cooling performance, this valve replaces the stock thermal bypass valve with a more durable, efficient solution that improves fluid flow and heat dissipation.

By allowing transmission fluid to reach the cooler sooner and more consistently, the Mishimoto valve helps maintain transmission health under heavy loads, towing, or extreme climate conditions. Its advanced design addresses common failures found in the factory valve, providing peace of mind and long-lasting durability for your truck’s transmission system.

Key Features:

This Thermal Bypass Valve Kit offers several key advantages over the stock unit, combining improved functionality with robust construction:

• Direct-fit replacement for 2013–2018 Ram 2500 and Ram 3500 6.7L Cummins transmissions (68-RFE and Aisin AS69RC)
• Includes a fully serviceable, replaceable thermostat that opens approximately 10°F earlier than the factory valve for faster warm-up and improved cooling
• Durable CNC-machined aluminum valve body with black anodized finish for corrosion resistance and long life
• Enhanced fluid flow in both thermostat and bypass modes for superior transmission cooling efficiency
• Interchangeable thermostat bypass option 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
• Mishimoto Lifetime Warranty ensures reliability and customer confidence

Construction & Design:

The Mishimoto Thermal Bypass Valve is crafted from high-quality CNC-machined aluminum, providing exceptional strength and thermal conductivity. Its black anodized finish offers excellent corrosion resistance, ensuring the valve withstands harsh under-hood environments and the rigors of heavy-duty use. The valve’s internal thermostat is fully serviceable and designed for enhanced durability compared to the stock unit, reducing the risk of failure that can lead to transmission overheating.

Additionally, the valve features precision-machined cooling fins that increase surface area for improved heat dissipation, helping to maintain optimal transmission fluid temperatures even under demanding conditions. The design allows for easy swapping of the thermostat bypass, 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 with 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 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 perfect for Dodge Ram 2500 and 3500 owners who tow heavy loads, operate in extreme temperatures, or seek 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 who want 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.