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electronic speedo, VSS ?
mechanical ?
either wya you would need ot change speedo gears in trans, cuz now the ratio isnt correct for the tire height
there is a formula for this, a local trans shop could give you it
also go to google and type in speedometer calibration
the goal is to go exactly one mile as close ot 60 seconds as possible, use stop watch and tgime yourself inbetween a set of mile markers
then youll know if you need to speed up vss or cable
smaller driven gear or bigger drive gear= faster output spin
opposite = slower
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