I have used a Garmin in three differant vehicles and now a 2639LMT in the motor home and I have never noticed a differant reading than that of the speedometer. I did once use a TomTom in a 57 Ford I had and they differed by many mph, of course the 57 didn't have anything factory on it so that was expected.
__________________
2017 Gemini 23TR Ford chassis w/ power stroke 3.2
DW, Daughter and 2 dogs, Sofie (black lab/boxer) and Phoebe (schnoodle)
|