I also noticed this on my Gryphon as well as when it was an Edge Evo, and I also have a '07 f150 screw. My EOT has always read 0. But then again there are a few reading on there that I have no idea what they are like...propeler shaft speed and turbine speed... the best i can asume is that proprler shaft speed would be the drive shaft, but as for turbine speed???
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