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| au man |
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Hey i have looked on the net but cant seem to find anything. Can someone tell me how much off my speedo would be when changing the diff ratio from 3.23 to 3.08?
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| kelv_05ef_wagon |
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i dont have much experience in his but its only 30 bucks for a new speedo gear and probly 30mins to install
_________________ xb falcon 500: currently being striped for full respray |
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| Olive Xm |
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| au man |
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kelv_05ef_wagon wrote: i dont have much experience in his but its only 30 bucks for a new speedo gear and probly 30mins to install I have just put the diff in to buy me some time to find someone to rebuild the one that s**t itself. Its too hard to find anyone now there mostly on holidays. Olive Xm wrote: http://www.fordmods.com/documents.php?d=30 Thanks for that didnt even see that. Looks like i wont be too bad only 1kph or so out. |
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| shyun |
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The car will be going about 5km/h faster than it says, you just divide the old ratio by the new ratio.
_________________ ED XR6, LeMans Red, 5-Speed |
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| Krytox |
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this should still be relevant for your car,
post974038.html?hilit=drive%20gear#p974038
_________________ Carefree, we may not be number one, but we're up there. |
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| revan8_NL |
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Age: 33 Posts: 130 Joined: 21st May 2009 Ride: NL Fairlane Concorde Ghia Location: Adelaide, SA |
shyun wrote: The car will be going about 5km/h faster than it says, you just divide the old ratio by the new ratio. Hows that meant to work? So my old ratio (3.23) and new ratio as of a couple hours ago  (3.91)i'd have a difference of 8 km/h??? The bigger the ratio the more accurate 
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| shyun |
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revan8_NL wrote: shyun wrote: The car will be going about 5km/h faster than it says, you just divide the old ratio by the new ratio. Hows that meant to work? So my old ratio (3.23) and new ratio as of a couple hours ago (3.91)i'd have a difference of 8 km/h??? The bigger the ratio the more accurate well if you just did that then your speedo will over-read by about 17%. The speedo gear goes into the gearbox, so it works off how fast that gearbox is rotating. If you put a different diff in without changing the speedo gear then the car will be going slower/faster than it would with the original diff-so the speedo is off.
_________________ ED XR6, LeMans Red, 5-Speed |
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| milo 302 |
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The speedo will read slower if you put a 3.08 instead of the stock 3.23.
 And if you change the speedo gear the shift patterns will be out in the auto  but the speedo will be correct
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