SKU: 6062213698

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

Sale price$134.09 Regular price$148.99
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Description

Mishimoto 12-18 Jeep Wrangler JK Transmission Thermal Bypass Valve KitThe 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 driveability 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

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 driveability 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 160F (71C), 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.
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Exchange/Return Notes
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SKU: 6062213698

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Gavin
Alexandria, US
★★★★★ 1
Avoid this handle if you use it
Color: Black, Size: Driver side
Good Product if you don't use it, terrible product if you do use it. The plastic it's made of is too flimsy and gets worse with heat. Installed this product and it only lasted a month and a half before the metal reinforcement plate ripped off the entire plastic handle assembly.
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Reviewed in the United States on September 4, 2025
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Online Customer
Houston, US
★★★★★ 5
Perfect match
Color: Tan, Size: Driver side
Fit our truck perfectly, color matches, and it looks like new again.
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Reviewed in the United States on January 31, 2026
W
Verified Purchase
William LiCalzi
Draper, US
★★★★★ 4
Fitment is decent
Color: Tan, Size: Passenger side
Overall a nice replacement color matched but the fitment was a little loose even though tightened well, where the end comes toward the top of the pillar it is loose and doesn't fit flush
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Reviewed in the United States on December 1, 2023
D
Verified Purchase
dan w
Waukegan, US
★★★★★ 5
thank you
Color: Tan, Size: Driver side
installed today fits like a glove
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Reviewed in the United States on December 22, 2025
E
Verified Purchase
ERNEST SCOTT HENDERSON
Carnegie, US
★★★★★ 2
Handle broke and had to reorder.
Color: Tan, Size: Driver side
The quality is not strong enough. Will not t recommend to others.
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Reviewed in the United States on December 13, 2024

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