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So I barely finished upgrading to 4.10 gears the other day and my speedo is off. I have hear to either get my computer flashed or changed the speedo gear in the transmission for 20 bucks. I have heard that changing the gear is not a perfect fix and can still leave the speedo off 10 mph. I dont want that though. My question is can they even flash my computer its obD1 MY CAR is a 95 gt automatic. what should I do here change the gear or have it flashed if I can. will the tranny gear fix the speed?
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