2017-2019 L5P Transmission Cooler Thermostat Bypass Plug Poker Night and when they go down

and when they go down

Access to Emissions ON & OFF Files

You’ll need to send us a stock HP Tuners readout from your truck

68RFE Electronic Line Pressure Booster Kit

and scan via VCM Suite (OBD-II)

2017-2019 L5P Transmission Cooler Thermostat Bypass Plug Poker Night and when they go down2017 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