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Discussion Starter · #1 ·
i got my car a while ago used and recently discovered it had 4.10 gears.
what are the ways to fix the speedo when you put in gears?

i know that you can use a tuning device, but is there any thing else? i read about "speedo gears" for 99-04 mustangs. do they also make these for the s197's? im just trying to figure out how they most likely changed the speedo so i can figure how to skin this cat when i get my xcal back.

thanks for all the help
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