{"product_id":"2017-2019-l5p-transmission-cooler-thermostat-bypass-plug","title":"2017-2019 L5P Transmission Cooler Thermostat Bypass Plug","description":"\u003cp\u003e2017-2019 L5P Duramax Billet Anodized Transmission Cooler Thermostat Bypass Plug, The stock thermostatic bypass for warming up the Allison quickly in cold weather conditions is a good idea in principle, but in practice we've seen the valve fail forcing trans fluid around the cooler in warm weather conditions that cause dangerous fluid temperatures for built and stock transmissions alike. We've been running this design on our shop development trucks and with our built transmissions successfully and are now making them available for purchase separately due to popular demand. Recommended for trucks with stock or built transmissions and performing heavy towing in warm climates to help keep fluid temperatures in check.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eCNC Machined Billet Aluminum Thermostatic Bypass Plug\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eHigh temperature silicone O-ring seals\u003c\/li\u003e\n\u003cli\u003eReduces fluid flow restriction to trans cooler\u003c\/li\u003e\n\u003cli\u003eSimple Installation\u003c\/li\u003e\n\u003cli\u003eExperience fluid temperature drops from 15-50 degrees F\u003c\/li\u003e\n\u003cli\u003eDirect replacement of the failure prone OEM thermostat\u003c\/li\u003e\n\u003cli\u003eEasy swap back to OEM setup for cold weather use\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Hill's Diesel","offers":[{"title":"Default Title","offer_id":47682436890842,"sku":null,"price":90.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0769\/1819\/4394\/files\/Screenshot2025-10-04020119_480x_27a1ea2e-49c0-4c83-8d1b-d95b9bf5cc80.webp?v=1773757564","url":"https:\/\/hillsdiesel.com\/products\/2017-2019-l5p-transmission-cooler-thermostat-bypass-plug","provider":"Hill's Diesel","version":"1.0","type":"link"}