speedo.. gears?

KBExperience · Aug 19, 2009

ever since i got my stang, the speedo has been 5-10 mph higher than i was actually going.. so today i was screwing with my tuner, and just for kicks i set the gear ratio to 3:73 and boom, the speedo was dead on with my gps, (which is accurate, many a radar have told me that) lol

does this mean the previous owner installed 3:73's?

Pearl02 · Aug 19, 2009

Sounds right. You could jack up the car and count the drive revolutions as you turn the tires. If you do have 3.73's you will notice that as you turn the tires one revolution your drive shift should turn approximately 3.73 times. If that's the case, your car has more miles on it than the odometer is showing. Pearl02.

KBExperience · Aug 19, 2009

wouldnt it have less miles? since the speedo was reading higher than it was supposed to?

TheSalad · Aug 19, 2009

Yeah. You should have a fraction of the mileage since the gears were put in. I will never understand why people don't correct it when they have gears installed.

98COBRA281 · Aug 19, 2009

the speedo reads higher, putting MORE miles on the car, the car thinks it going faster then it realy is..........

Pearl02 · Aug 20, 2009

KBExperience said:
wouldnt it have less miles? since the speedo was reading higher than it was supposed to?

Yea, your right. My brain was turned around. Pearl02.

bboylobo · Aug 20, 2009

is there a way to get the tru mileage of the engine if this was the case? same thing happen to me.

KBExperience · Aug 20, 2009

no, im pretty sure there isn't.. we're pretty much S.O.L.

speedo.. gears?

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