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Discussion Starter · #1 ·
Hey everyone, recently did a 3.73 swap from my 3.31's and after using the x4 and adjusting final drive to 373 and re installing tune, im finding my speedo to still be off
at times by quite a bit, almost 15-20mph off
it reads high
i played around with tire revs per mile and figured around 730 on stock tire and still off
any one else run into this issue or suggestions?
thanks
 

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Your tuner can send you a revision for the gears.
 
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