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Speedo recal for TH400

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Old Mar 31, 2010 | 02:05 PM
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Default Speedo recal for TH400

So I just installed a TH400 in my car. It is a Rossler trans and has a speed sensor in it. Does anyone know what I need to change my tables to to get my speedo to work. It is way off now. Oh and the car was an M6. Thanks
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Old Mar 31, 2010 | 03:11 PM
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mine worked just fine after i put my turbo 400 in ?
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Old Mar 31, 2010 | 03:28 PM
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Hey Dan,

GOing from M6 to a non-computer controlled trans, you can compute your % error and put it against your VSS Pulses per mile to get that in line. Go for a ride with a GPS and see what you get. That's the quick and easy way to rough it in.
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Old Mar 31, 2010 | 08:34 PM
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Your M6 VSS only had 17 pulses per revolution, if the put a normal automatic reluctor in your T400, it will have 40 pulses per revolution. What are you using to tune it, I'm sure somebody will know where that value is in your tables
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Old Mar 31, 2010 | 08:42 PM
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I am using HP tunners. I found in the auto forum that it is a 40 tooth reluctor so I am changing that now.
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