Re: speedometer calibration question
In a mustang the ABS is a seperate module, it measures wheel speed at all 4 wheels and changing gears will not throw it off.
The dealer tools do not have enough adjustability range. You need an aftermarket chip, tuner, or speed cal to fix your speedo.
2007 Shelby GT500 705RWHP/708RWTQ
2000 Mustang 3.8 A4 TT 450RWHP/475RWTQ 10.996@127 17psi stock 3.8
2006 F250 CC 4x4 6.0L 14.3 @ 93
2006 Mustang 4.0 M5 Vortech 13psi 395RWHP/374RWTQ wife's car