Speedo Ratio Box (or Adapter Box)

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Speedo Ratio Box (or Adapter Box)

Postby Johnno » Thu Oct 12, 2017 9:52 am

Hi Guys,

Wanting to install a Ratio Box (or adapter box as they are sometimes called) to compensate for a taller diff in the Lancer. The original diff was a 3.89:1 (I think) and the newer diff out of a Scorpion is close to 3.30:1.
At an indicated 80 kph on the speedo, the actual speed is closer to 90 kph.
Anyone know of a supplier of ratio boxes whose prices aren't exorbitant?
And anyone know the thread size on the speedo cable and the size of the square drive?

Thanks.
Johnno
 
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Country: Australia (au)

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