Speedometer change not working

[bkg06gto]

2020 mustang GT, exhaust, no cats, jlt intake, E85. Just swapped to a different t size tires and it started throwing a torque source: traction control in every gear from 5k rpm?s to 6800 and it closes throttle horrifically.I?m assuming it?s from the different tires and decided to change it. For whatever reason, following guides I?ve seen here, I always get failed to write in the VCM scanner


Is there some sort of trick im missing with the VCM scanner?

Thanks.

[Jackson3010]

what exactly did you change? from what to what?

[veeefour]

Change the drive ratio and tire to "calibration" and set it properly. +2020 BCM is crazy and does not like ratio and tire changes.

[bkg06gto]

Thanks for the replies. Went from factory pp1 sizes 255/40/19 and 275/40/19 to 285/35/19 all the way around.

I tried the calibration way and it still says torque source:traction control at that RPM range. Maybe I don?t have min and max set right?

Only reason I feel this is the issue is the car didn?t do it prior to tire change.

[bkg06gto]

Unless me having a MPV1 is the issue as well. If so, I fixed that issue last night and ordered the 3