speedometer calibrated

Discussion in 'Freightliner Forum' started by muddflap, Mar 12, 2016.

  1. muddflap

    muddflap Bobtail Member

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    Mar 12, 2016
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    speedometer calibrated on a freightliner xl my vin is b93164
    please help
     
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  3. Animosus

    Animosus Heavy Load Member

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    You'll have to calculate pulses per mile and change that parameter using ET.
     
  4. muddflap

    muddflap Bobtail Member

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    Mar 12, 2016
    0
    how do i do that
     
  5. GrapeApe

    GrapeApe Road Train Member

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    Jan 7, 2013
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    You need to know your drive tires rotations per mile, most tire manufacturers list tires specs online, search for your model/size tire. Multiply rotations per mile by the axle ratio, then multiply that by 16 (16 teeth on the VSS ring). That will give you total pulses per mile. Once you know the pulses per mile, you need a computer with Caterpillar ET, you adjust pulses per mile in the VSS parameters.
     
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