Hey everyone. I've got a customer with a 2018 Mustang GT with a 10R80. Anyone have an idea of how the trans shifting strategy works? Looking over the tune, it seems the Upshift OSS and Max OSS maps are set quite a bit higher than where the shift points occur. When I set the shift points in the WOT upshift map to about 7400 across the board, on the 6-7 shift the car would go into limp mode, ETC FMEM, and throw a serial communications error every time. I raised everything I could find before I finally just set the shift points back to stock. Has anyone experienced this? I can't get a log of it because the scanner goes blank as soon as it happens. I haven't been able to find anything definitive as to what to do and how to properly raise the shift points.
18MustangTransTuningTest1.hpt