Full installation process of Spe Motorsports low temp high flow thermostat for the 2011 - 2022 6.7 Powerstroke
SPE Motorsports - DESCRIPTION -
"Are you seeing uncomfortably high oil temperatures during normal driving or towing? Does your 2017+ Powerstroke seem to have high transmission temperatures? There's finally an engineered solution for those high fluid temps on your 6.7L Powerstroke! After extensive testing and consideration of the 6.7L Powerstroke application SPE has engineered a thermostat to combat high fluid temperatures. The OEM thermostat opens at 194/201°F whereas the SPE Low Temp, High Flow Thermostat opens at 175/180°F. That's a significant decrease in temps as it's a 19-21 degree difference! The solutions currently available on the market for controlling your coolant, oil, & transmission temperatures* (17+ only) are not cost effective or actual solutions to a simple problem."
After running this product for a few weeks in both my 2014 f350 dually and 2020 F550 service truck, I can confirm that this does in fact lower transmission temps in my f550/10r140 and in both units the coolant temp range stays 175f - 195f vs the 200f - 230f that I was seeing previously with my F550.