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Diff Ratio

Discussion in 'VY Holden Commodore (2002 - 2004)' started by DanoSS, Feb 7, 2007.

  1. DanoSS

    DanoSS New Member

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    I'm getting my diff ratio changed to a 3.9 tomorrow in my vy ss and im just wondering will the speedo need to be re-calibrated? Would i need to get it done straight away because if it says im going 60 i could be going faster?
    Cheers
     
  2. klaw81

    klaw81 New Member

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    If you're going from a factory diff ratio to 3.9's you will be going about 10% slower than your speedo says, not faster. If they can recalibrate it on the spot, you might as well get it done...but there's no hurry.
     
  3. DanoSS

    DanoSS New Member

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    Great help, thanks for the reply!
     
  4. klink

    klink New Member

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