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Speedo Question

1258 Views 4 Replies 5 Participants Last post by  DZAUTO
I know this was answered before, but I can't manage to find it on the site so here goes

I changed my tranny from a pg to a TCI th350. In addition, the tires went from whatever the heck was on the car originally (not stock) to 15" rims with 275s on 'em. I know the speedo is off. How do I figure out how off my speedo is? Is it a function of just the tranny, or the tranny and the tires? How do I correct this (I know there are Speedo gears somewhere in the tranny (?) but where do I get new ones, or is this not my problem)? TIA--Amanda
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