speedo ratios

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polo2k
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speedo ratios

Post by polo2k »

Hi all,
I have a 1963 1098 4 door that is fitted with 13" wheels and a 1301 speedo

I am planning on changing from the 4.22 to a 3.9 diff. how can I get the speedo to read right again? is there an inline gearbox that I can use?
- Ash
  • [MONA] - 1963 4 door saloon
    [IGOR] - 1970 trav (In Surgery)
    [GOLFIE] - 2001 Golf GT TDi 200 (my daily "fix")
- The only way your guarenteed to fail, is never to try! -
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mike.perry
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Re: speedo radios

Post by mike.perry »

I am running a 3.9 diff and 175/80X13 tyres and my 1408 speedo is spot on. Before you change speedos check yours with a Sat. Nav. The only thing that affects the speedo gearing is the tyre size and axle ratio.
There is a comprehensive list of speedos on the Series MM website, Car Ident. http://seriesmm.mmoc.org.uk
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bmcecosse
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Re: speedo radios

Post by bmcecosse »

1248 from a Mini is absolutely spot on with 3.7 ratio and 155X14 tyres, But it doesn't play any tunes.....
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charlie_morris_minor
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Re: speedo radios

Post by charlie_morris_minor »

the other option, done by another member.. is to strip the paint of the current speedo.. go for a drive with a satnav and mark the speedo at 10 / 20 ... etc etc
chrisryder
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Re: speedo radios

Post by chrisryder »

charlie_morris_minor wrote:the other option, done by another member.. is to strip the paint of the current speedo.. go for a drive with a satnav and mark the speedo at 10 / 20 ... etc etc
the downside to that is that the mileage will still be reading wrong even though the speed is right!
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