Still trying to get an accurate diagnosis, but it is likely going to be the PCM, transmission or an electrical/exposed wire on the harness. Over the last year or so I had been considering putting in a transmission cooler in and then I had some problems last week that sent the Jeep into the shop. I really enjoy this vehicle and I plan on keeping it for the duration. I bought the Jeep with 118k miles on it and the PO had just replaced the transmission at 114k. Also, I occasionally pull a work trailer that weighs about 1,500lbs unloaded. I have aftermarket bumpers and quite a bit of underbody armor which I would say increases the vehicle weight by around 500lbs. I have 2006 4.0 LJ Rubicon with and automatic transmission, 32” tires and 150K on the odometer. This place is paradise for nine months out of the year, but the remaining three months are rough. That's why a sturdy thermal bypass valve is essential for the Jeep JK Wrangler, along with a myriad of other Mopar products.īefore we dive straight into our new design, let's take a look at the who, what, and why of the thermal bypass valve.So I live in the Phoenix area and we are just hitting our 40th consecutive day of 110+ degree weather. True, there are plenty of means of maintaining transmission fluid cool with external coolers, but they won't do you any good if the fluid never makes it to the cooler. Jeeps pride themselves on being ready for any situation, from the dusty trails to mall parking lots, but are they in it for the long haul? Where the transmission is the soul of the Jeep, keeping it cool can sometimes pose a challenge. The sturdy gear sets housed inside, transferring power from the engine, give the Wrangler its go anywhere, do anything attitude. The transmission in your JK Wrangler is practically the essence of what makes it a Jeep. Mishimoto does not recommend customers in cold climates install the thermostat bypass to avoid overcooling of the transmission fluid This performance thermostatic bypass valve only fits vehicles with 5-speed automatic transmissions The included thermostat opens at the stock temperature of 160☏ (71☌), but the valve can be customized to suit your needs withįits Vehicles With 5-Speed Automatic Transmission 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. 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. Our performance thermostatic bypass valve features a fully-serviceable and removable thermostat. That's why Mishimoto has developed a performance thermostatic bypass valve for the 2012-2018 Jeep Wrangler JK. Moreover, those who live in hot climates will likely never have to worry about overcooling, rendering the valve a useless flow restriction. However, when the thermostat in this valve fails, it's almost a guarantee your transmission will overheat. This valve ensures fluid doesn't flow through the cooler before the transmission reaches operating temperature, preventing overcooling in cold environments. 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. 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. The transmission in your 2012-2018 Jeep Wrangler JK is the heart of its drivetrain.
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