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- Tue Jan 15, 2019 10:33 pm
- Forum: Beta testing
- Topic: Setting arbitrary tire sizes for speedometer calibration
- Replies: 84
- Views: 74316
I have a 2015 Ford Fusion Titanium. Ever since I bought it there has been a 2 mph speedometer error compared to GPS - at 70 mph on GPS, speedometer reads 68. Used the spreadsheet calculator found elsewhere on this forum to change BCM 726-12-01 from xxx-0804-xx to xxx-07CB-xx. Test drove right away. ...