Mishimoto 12-18 Jeep Wrangler JK Transmission Thermal Bypass Valve Kit - #MMTC-JK-TBV

The transmission in your 2012-2018 Jeep Wrangler JK is the heart of its drivetrain. Whether you're hauling groceries or hitting the trail, it's vital to keep it performing at its best, and keeping the transmission fluid cool is crucial to that goal.

In an attempt to balance drivability and the health of your transmission, Jeep fitted a thermostatic bypass valve to the lines that feed the transmission cooler. This valve ensures fluid doesn't flow through the cooler before the transmission reaches operating temperature, preventing overcooling in cold environments. However, when the thermostat in this valve fails, it's almost a guarantee your transmission will overheat. Moreover, those who live in hot climates will likely never have to worry about overcooling, rendering the valve a useless flow restriction.

That's why Mishimoto has developed a performance thermostatic bypass valve for the 2012-2018 Jeep Wrangler JK. Our performance thermostatic bypass valve features a fully-serviceable and removable thermostat. For those who live in hot climates, the thermostat can be replaced with the included bypass to allow full flow to the transmission cooler at all times. Speaking of flow, the Mishimoto performance thermostatic bypass provides increased flow over the stock valve to ensure your transmission cooler operates at peak efficiency, even with the thermostat installed. The included thermostat opens at the stock temperature of 160°F (71°C), but the valve can be customized to suit your needs with any available Mishimoto thermostat .

The Mishimoto performance thermostatic bypass valve is a direct-fit* and is made from durable aircraft-grade aluminum that's anodized to withstand even the harshest environments. Like all of our Jeep products, our performance thermostatic bypass valve is backed by our Mishimoto Lifetime Warranty.

Vehicle Fitment

• 2005-2014 Chrysler 300
• 2008-2014 Dodge Challenger
• 2006-2019 Dodge Charger
• 2011-2013 Dodge Durango
• 2005-2008 Dodge Magnum
• 2007-2011 Dodge Nitro
• 2009-2010 Jeep Commander
• 2007-2013 Jeep Grand Cherokee
• 2012-2018 Jeep Wrangler
• 2018 Jeep Wrangler JK
• 2012-2020 RAM 1500
• 2012-2013 RAM 2500
• 2008, 2011-2012 Jeep Liberty

⚠ WARNING (California Prop 65): This product can expose you to chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Image is for reference only; actual product may vary by application.

Manufacturer Part Number: MMTC-JK-TBV