Model: MMTC-JK-TBVFF

Full-Flow Thermal Bypass Valve Kit, fits Jeep Wrangler JK 2012-2018

$90.95
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Installation Specs

Easy
DIFFICULTY
1 Part
PARTS INCLUDED
  • • (1) CNC-Machined Billet Aluminum Thermal Bypass Valve
  • • Mishimoto Lifetime Warranty
Key Benefits
  • 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 160F 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

Key Benefits

  • 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 160F 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
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.
More Information
Engine Codes LH
Pentastar
PowerTech
EKG
5.7 Hemi
6.1 Hemi
6.4 Hemi
Chassis Codes LX
KA
1500
2500
WK
WK2
KK
XK
JK
Transmission Codes 42RLE
65RFE
W5A580
W5J400
Note This performance thermostatic bypass valve only fits vehicles with 5-speed automatic transmissions.

Mishimoto does not recommend customers in cold climates install the thermostat bypass to avoid overcooling of the transmission fluid.

For Ram trucks, double check that you have a 65RFE transmission before purchasing this product. If you have a column or floor shifter, you likely have a 65RFE transmission. If you have a rotary dial shifter (knob), you likely have a 8HP70 transmission and this product will not fit.
(1) CNC-Machined Billet Aluminum Thermal Bypass Valve
Mishimoto Lifetime Warranty

Mishimoto Automotive (“Mishimoto”) warrants its products under this lifetime limited warranty policy (“Warranty Policy”). This Warranty Policy applies solely to: (i) Mishimoto Products purchased directly from Mishimoto or Mishimoto authorized dealers (each a “Mishimoto Product” and collectively, the “Mishimoto Products”) and (ii) the original purchaser of such Mishimoto Product (“Purchaser”). This Warranty Policy is non-transferable and all claims under this Warranty Policy must be accompanied by the original sales receipt. The terms and conditions of this Warranty Policy are subject to change by Mishimoto at any time without notice.

For our complete warranty policy, please click here.

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Full-Flow Thermal Bypass Valve Kit, fits Jeep Wrangler JK 2012-2018

Model
MMTC-JK-TBVFF
$90.95