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Ok, I have a question that might seem like a no brainer, but I haven't a clue....
I know on some of the cars back in the 60's & 70's that if the speedometer was off then the odometer was also off...
But with the newer type cars is that the same case??? In other words my speedometer is 5 miles an hour off - The gauge says 75 and I am only going 70... Does this affect the odometer also in that I am not showing as many miles as I actually traveled or is it showing more, or is it showing correctly????
Your tire size changes the speedo reading. Go to a speedometer shop and they can change the speedometer gear in the transmission to match your tires to the correct speed. When I changed to a larger size tire I was off almost 10mph, according to police, so I went to a speedo shop and they verified that and fixed it.
You odometer should not be effected.
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the speedometer shows you how fast you are going, your odometer shows you have far you have gone, I would not expect the distance to change based on how fast or slow you get there; it would still be the same distance.
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the speedometer shows you how fast you are going, your odometer shows you have far you have gone, I would not expect the distance to change based on how fast or slow you get there; it would still be the same distance.
Since they work in conjunction with each other.. if the speedo is off, your odometer will be off as well.
Part of a vehicles design is the calibration of the speedometer and odometer. The transmission gears and the differential gears will determine how many revolutions the tires will turn in a mile. Part of the calculation is also used to determine the gearing of the speedo and odo. The tire size is selected by the engineers to make everything gel. Changing the tire size from a factory stock wheel to a monster jam truck tire throws all calculations out the window.
With the computerized speedometer/odometers you can possibly throw in another variable. On my last car, I used an app on my phone to tap into the OBDII computer, and it offered a vehicle speed option as recorded by the computer, and also a GPS speed. Now on my car, add in the regular speedometer and you get 3 different speeds! The computer speed was always 2-3 mph more than the speedometer showed, and the GPS never matched either! I wonder if this is on purpose to give you a cushion for tickets? But on my wife's Equinox, the computer speed is spot on with the speedometer and the digital display options.
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