Mishimoto MMTC-GMP-TBV Transmission Thermal Bypass Valve Kit for 12-21 Challenger, Charger & 300 with 3.6L & 8HP45 Or 845RE

Product Code: misMMTC-GMP-TBV
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All Mishimoto products come with a lifetime warranty.
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Mishimoto has identified a common failure point in the transmission cooling system of your 2012-2021 Mopar: the thermal bypass valve. This component acts as a thermostat, restricting fluid flow to the external transmission cooler based on temperature. Unfortunately, many vehicle owners have found these factory units are prone to failure, often sticking in the closed position resulting in an overheating transmission.

The engineering team at Mishimoto has created a high-quality thermal bypass replacement with numerous additional features to ensure consistent performance and long transmission life. This unit is constructed from durable CNC-machined billet aluminum, featuring a heat sink design that provides improved heat dissipation and unique styling. The included thermostat opens at the stock temperature of 160°F (71°C) but can be customized to suit your needs with any available Mishimoto thermostat. The Mishimoto thermal bypass kit also includes a bypass that can replace the thermostat, allowing constant fluid flow to the transmission cooler. The bypass is ideal for vehicles requiring maximum cooling while operating in extreme driving conditions or hot climates. This kit easily installs within one hour and connects directly to all factory cooler piping.

This 2012-2021 Charger/Challenger/Chrysler 300 Thermal Bypass Full Flow Valve Kit is built to last a lifetime with a durable black anodized finish and our Mishimoto Lifetime Warranty.

  • Direct fit for Dodge Challenger/Charger/Chrysler 300 w/ 8HP transmission
  • Eliminates failure-prone stock bypass valve
  • Includes fully serviceable thermostat for fast warm-up in cold climates and thermostat bypass for constant cooling in hot climates*
  • Improved flow over the stock bypass valve
  • Installs in less than 1 hour
  • Durable CNC-machined billet aluminum construction
  • Helps extend transmission life and prevent overheating
  • Includes 160°F thermostat to match stock valve opening temp
  • Fits with stock transmission cooler piping, requiring no modification for installation
  • Integrated heat-sink fins provide unique styling and added heat dissipation
  • Durable anodized finish
  • Mishimoto Lifetime Warranty

(1) CNC-Machined Billet Aluminum Thermal Bypass Valve
(1) Removable Thermostat
(1) Removable Thermostat Bypass w/ Installation Hardware
(1) Assembly Notecard

  • *This performance thermostatic bypass valve only fits vehicles with 8-speed automatic transmissions
  • Mishimoto does not recommend customers in cold climates install the thermostat bypass to avoid overcooling of the transmission fluid