Anyone had any luck calibrating their 2020 trucks? Hypertech does now list the 2020 model year as compatible with their calibrator, but even with the latest firmware update it doesn't seem to work on my 2020 F150.

 

What size tires did you go to? I did mine through Forscan versus the Hypertech thing.

 

34X10.5/17 KO2's, but they're probably more like 33's in reality. GPS speed test will enable me to get calibration correct, but only if I can get in there and reprogram tire diameter, which I can't as of yet.

 

Firmware update for the 2020's was released this morning! Will now work.

Going by GPS, I found that programming in a 31.5" tire gets speedo bang on. That was quite surprising, as 34" KO2's are advertised as a 33.5" tire!