..Hi All, I am trying to change tire and wheel size on my son-in-law's 2018 FX4 (275/55-20 to 315/70-17). I am using FORscan and despite on-line help, I keep ending up with a wrench display.

If someone would kindly check the OEM data for tire size (three word coded) and circumference and post what their data is, it may point out my error(s).

TIA,
Brad

 

Did you do the PCM relearn process? Most likely the 2018 will need to have that part done too.

 

yea there is a pcm re learn process in forscan

 

Yes, but perhaps I screwed up. I'll try again.

Thanks,
Brad