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doesnt matter. the speedo gear goes in your transmission. just know that no matter what size you get, 4.10s will still make the speedo off by about 10%. anyway, www.steeda.com has them and you will want the 23 tooth speedo gear. just scroll down and find your year and tranny and choose that one.
 

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2013 GT Track-Pack
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brent, return the speedo gear... if you buy that speedcal from DM, you wont need it at all cause that thing will correct it for you.
 

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232stang said:
i didnt know gears messed with your top speed
well the only reason it does is because your ECU tops out your speed at like 115 or something close to that and without correction your ecu registers your speed as 115 when your only going like 90 plus it really screws up your speedo.

i tried to explain this as best i could im sure something is wrong and they will point it out
 
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