Mishimoto Thermal Bypass Full Flow Valve

2019–2024 Ram 2500 / Ram 3500 6.7L Cummins

MMTC-RAM2-TBVFF

Overview:

The Mishimoto Thermal Bypass Full Flow Valve is a precision-engineered upgrade designed specifically for the 2019 to 2024 Ram 2500 and Ram 3500 equipped with the 6.7L Cummins engine. This critical component replaces the stock in-line thermal bypass valve found in the Aisin AS69RC transmission cooling system. Unlike the factory valve, which restricts transmission fluid flow to the cooler until it reaches operating temperature, Mishimoto’s full-flow valve eliminates the internal thermostat to provide continuous fluid circulation. This ensures optimal cooling performance under all driving conditions, reducing the risk of transmission overheating and extending the life of your transmission.

Ideal for Ram owners who tow heavy loads, operate in warm climates, or demand the highest level of transmission cooling efficiency, this valve upgrade enhances reliability and peace of mind. By maintaining lower transmission fluid temperatures, it protects your transmission from heat-related damage and performance degradation.

Key Features:

Engineered for durability and superior cooling, the Mishimoto Thermal Bypass Full Flow Valve offers several advanced features:

• Full fluid flow design eliminates the stock thermostat for uninterrupted cooling
• CNC-machined billet aluminum construction for strength and longevity
• Strategically machined internal passages improve fluid flow over the factory valve
• Integrated cooling fins on the valve body enhance heat dissipation
• Bypass feature ensures continuous cooling in hot weather or heavy-duty conditions
• Fully serviceable thermostat option for rapid warm-up in cold climates
• Direct fitment for 2019–2024 Ram 2500 and Ram 3500 models with 6.7L Cummins
• Backed by Mishimoto’s Lifetime Warranty for lasting reliability

Construction & Design:

The valve is crafted from high-quality billet aluminum using CNC machining techniques to guarantee precision and durability. Its robust design withstands the demanding conditions of heavy towing and extended operation. The internal fluid passages are optimized to maximize flow rate, reducing fluid temperature more effectively than the stock valve. Additionally, the cooling fins machined into the valve body increase surface area for enhanced heat dissipation, helping maintain stable transmission fluid temperatures even under extreme loads.

Installation & Fitment:

This thermal bypass valve is a direct replacement for the factory unit on Ram 2500 and Ram 3500 trucks equipped with the 6.7L Cummins engine from model years 2019 through 2024. Installation requires no modifications and can be completed with basic hand tools. The design ensures a seamless fit into the existing transmission cooling system, allowing for quick and straightforward upgrades without the need for additional components or adapters.

What's Included:

• Mishimoto CNC-machined billet aluminum thermal bypass valve
• Installation hardware and fittings
• Detailed installation instructions

Ideal For:

This full-flow thermal bypass valve is perfect for Ram 2500 and 3500 owners who:

• Regularly tow heavy trailers or haul substantial payloads
• Operate their trucks in hot or demanding environments
• Seek to improve transmission cooling efficiency and reliability
• Want to prevent transmission overheating and extend transmission life
• Prefer a durable, maintenance-friendly upgrade backed by a lifetime warranty

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.