Heating and Cooling› Thermostats, Housings and Fillers
Mishimoto
Mishimoto Mopar Pentastar / Hemi Thermal Bypass Valve Upgrade
SKU: M00C MMTC-JK-TBVFF
Moderate — 2–4 hours
Description
Part #: MMTC-JK-TBVFF
The transmission in your Jeep Wrangler 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 full-flow thermostatic bypass valve for the 2012-2018 Jeep Wrangler. The Mishimoto thermal bypass valve kit includes an all-aluminum CNC-machined housing that replaces the stock unit. This full-flow valve allows fluid to pump through the cooler as soon as the vehicle is started, eliminating the potential failure point of the stock bypass and providing cooling benefits. The full-flow design is beneficial to vehicles operating in hot climates, extreme driving conditions, or towing heavy loads. As with all Mishimoto products, this Full-Flow Transmission Thermal Bypass Valve Kit includes our signature Lifetime Warranty.
Features:
- Direct-fit for 2012-2018 Jeep Wrangler JK
- Installs in less than 1 hour
- Durable CNC-machined billet aluminum design
- Increased flow over stock bypass valve
- Includes 160 degreesF thermostat to match stock valve opening temp
- Customize the valve's opening temp with a range of Mishimoto thermostats
- Fully serviceable thermostat for fast warm-up in cold climates and thermostat bypass for constant cooling in hot climates
- Machined cooling fins for added heat dissipation
- Durable anodized finish
- Mishimoto Lifetime Warranty
Full-Flow Transmission Thermal Bypass Valve Kit, fits Jeep Wrangler JK 2012-2018
MIA's Description
The kit includes a 160F thermostat matching the stock opening temperature, and is backed by Mishimoto's Lifetime Warranty.
Fitment
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Specifications
| Brand | Mishimoto |
| Part Number | M00C MMTC-JK-TBVFF |
Videos
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Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.
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