Mishimoto Thermal Bypass Valve
2019–2024 Ram 2500 / Ram 3500 6.7L Cummins
MMTC-RAM2-TBV
Overview:
The Mishimoto Thermal Bypass 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 manages the flow of transmission fluid to the cooler, ensuring your transmission operates within optimal temperature ranges. Unlike the stock thermal bypass valve, which can fail and cause overheating, Mishimoto’s valve features a durable, serviceable thermostat that opens earlier to improve cooling efficiency without risking over-cooling.
Built for Ram owners who demand reliability and longevity from their drivetrain, this valve enhances transmission cooling performance, protects against heat-related damage, and offers a customizable bypass option for extreme climates. It’s an essential upgrade for anyone looking to maintain peak transmission health under heavy loads or harsh conditions.
Key Features:
Engineered for superior transmission fluid management, the Mishimoto Thermal Bypass Valve offers:
- CNC-machined aluminum construction for durability and improved heat dissipation
- Replaceable, fully serviceable thermostat that opens approximately 10°F earlier than stock
- Increased fluid flow compared to the factory valve for enhanced cooling efficiency
- Interchangeable thermostat bypass plug for constant full flow in hot climates
- Cooling fins integrated into the valve body to further reduce fluid temperature
- Durable black anodized finish for corrosion resistance and long-lasting appearance
- Compatible with both 68-RFE and Aisin AS69RC transmissions used in Ram 2500 and 3500 models
- Backed by the Mishimoto Lifetime Guarantee for peace of mind
Construction & Design:
The Mishimoto Thermal Bypass Valve is crafted from high-quality CNC-machined aluminum, providing superior strength and thermal conductivity compared to the stock plastic valve. Its black anodized finish protects against corrosion and wear, ensuring a long service life even under demanding conditions. The valve’s integrated cooling fins increase surface area to dissipate heat more effectively, helping maintain optimal transmission fluid temperatures.
The valve features a fully serviceable thermostat that can be replaced without removing the entire unit, allowing for easy maintenance and customization. The thermostat is calibrated to open earlier than the factory unit, promoting quicker fluid circulation to the cooler and reducing the risk of overheating during heavy towing or extended operation.
Installation & Fitment:
Installation of the Mishimoto Thermal Bypass Valve is straightforward and requires no modifications to your Ram 2500 or 3500’s transmission cooling system. It is a direct replacement for the factory valve on 2019–2024 models equipped with the 6.7L Cummins engine. The included bypass plug can be swapped using just a wrench, allowing you to tailor cooling performance for seasonal or climate-specific needs.
This valve fits the following Ram models and trims:
- Ram 2500 Big Horn (2019–2024)
- Ram 2500 Laramie (2019–2024)
- Ram 2500 Laramie Longhorn (2019–2021)
- Ram 2500 Limited (2019–2024)
- Ram 2500 Limited Longhorn (2021–2024)
- Ram 2500 Lone Star (2019–2024)
- Ram 2500 Rebel (2023–2024)
- Ram 2500 Special Service (2024)
- Ram 2500 Tradesman (2019–2024)
- Ram 3500 Big Horn (2019–2024)
- Ram 3500 Laramie (2019–2024)
- Ram 3500 Laramie Longhorn (2019–2020)
- Ram 3500 Limited (2019–2024)
- Ram 3500 Limited Longhorn (2021–2024)
- Ram 3500 Lone Star (2019–2022)
- Ram 3500 SLT (2019–2024)
- Ram 3500 Special Service (2024)
- Ram 3500 Tradesman (2019–2024)
What's Included:
- Mishimoto CNC-machined aluminum thermal bypass valve assembly
- Replaceable thermostat installed
- Thermostat bypass plug for constant cooling option
- Installation hardware and instructions
Ideal For:
This thermal bypass valve is ideal for Ram 2500 and 3500 owners who tow heavy loads, operate in hot or variable climates, or simply want to improve the reliability and longevity of their transmission. It is especially beneficial for those who experience transmission overheating issues due to thermostat failure in the stock valve or who want to optimize transmission fluid temperatures for enhanced performance and durability.
