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: New rear axle gears; speedo off now KC-RUNNER 08-10-2007, 05:18 PM I just installed a 14 bolt 10.5 rear axle with 3.21 gears. What would be the best way to correct the speedo??? What electronics has anyone used that work well??? I have a Banks OTTO MIND now so I don't really need a tuner. TXS Chris ob_1jr 08-10-2007, 08:01 PM Your best bet would be to get a predator, PPE, or EFI live. I think that is the only way that you will get your speedo and odometer to show right. Other than that, you can just buy a GPS and use it for speed. You can get a predator for $300 new or less if you buy used. | ||