Gps And Speedo Differ - Toyota Tundra Forums : Tundra Solutions Forum

MHARRI20@TAMPABAY.RR · #1 (**permalink**) 08-22-2006, 11:38 AM

I am running 17" tires on my FJ. I am using a TomTom300 GPS. The speed readings on the GPS, which were pretty accurate in my previous Toyota 4 Runner and showing about 5 MPH less than the speedometer. Can't understand this since it was just about right on in my other car. Of course the GPS does not care what size your tires are...........

Anyone figure this out?

TwinStop · #2 (**permalink**) 08-22-2006, 12:26 PM

Quote:

Originally Posted by MHARRI20@TAMPABAY.RR

I am running 17" tires on my FJ. I am using a TomTom300 GPS. The speed readings on the GPS, which were pretty accurate in my previous Toyota 4 Runner and showing about 5 MPH less than the speedometer. Can't understand this since it was just about right on in my other car. Of course the GPS does not care what size your tires are...........

Anyone figure this out?

The FJ's speedo is off.

Tundrav8yamaha · #3 (**permalink**) 08-30-2006, 02:00 AM

Quote:

Originally Posted by TwinStop

The FJ's speedo is off.

sounds like it's off big time

I know in my Tundra My Pioneer avic headunit the setting speed and Compass when i press that on my navi screen the Information and speed is dead On target within the speedo cluster ///