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Speedometer ??

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Old Nov 23, 2008 | 08:45 AM
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From: Farifax Station VA
Default Speedometer ??

My speedometer needle was bouncing around, so I replaced the cable. I bypassed the cruise control mechanism, and ran a longer cable straight from the auto trans to the speedometer.

Problem: the speedometer is 8mph low.
I have only had the car for a year, could this be becuase the trans is geared different; i.e. could the cruise control mechanism that I bypassed affect the speed read out.

thoughts??
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Old Nov 23, 2008 | 08:55 AM
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From: THE OLDER I GET THE BETTER I WAS! NORTHERN ONTARIO
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I think I have heard about this before...someone just recently did the same thing & found their speedo reading was off as well...can you soak the old cable with tranny fluid re install it & see what happens? Just a thought
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Old Nov 23, 2008 | 09:23 AM
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No, I replaced it several months ago and threw it out.
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Old Nov 23, 2008 | 09:40 AM
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Originally Posted by TyCor
Problem: the speedometer is 8mph low.
I have only had the car for a year, could this be becuase the trans is geared different; i.e. could the cruise control mechanism that I bypassed affect the speed read out.

thoughts??
I doubt it. Could you get an accurate reading before the change or was it bouncing too much? Is the rear gear stock? Sounds like the rear gear was changed and not the speedo drive gear.
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Old Nov 23, 2008 | 09:44 AM
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I now the engine is not the original, and the trans appears to have been replaced at some point also. I am not sure about the gearing. the needle bounced around too much before, so I don't know if it was accurate.

Any other ideas? How can I tell if the rear was replaced with different gears.
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Old Nov 23, 2008 | 11:04 AM
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You can change the driven gear in the transmission. 1 tooth is about 5 mph. This would get you closer.
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