speed O against odometer
OK,probably simple.My speedometer in my 62 GP is 21% off.Will that mean my odometer is 21% off.I feel it should be.Tom
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Yes
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Thanks!Tom
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I’m not sure that’s necessarily true. It could be, though. The odometer is strictly a mechanical connection, so it is what it is, but the speedometer needle is driven magnetically, with no mechanical link, and the two wouldn’t have to match. Just my 2 cents.
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speedo is magnetically coupled and the needle reading fights a return spring. That copper spring could have corrosion and read high.
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I know the speedo is off because of a trans and rear end change.I have that handled just was wondering about the odometer.Tom
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With a trans and axle change everything will be off by the same amount. You can correct both by changing the speedometer gear in the transmission.
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The only way to correct my trans is to make a change on the internal gear on the main shaft.I have learned to live with it.Tom
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I think you can get an adapter to go between the cable and the tranny.
But otherwise just remember to change the mileage for MPG calculations by 21% up/down. :) |
When I had 4.10s,L60 15s in my SD I got the external adapter. It worked. GM had at least 2 that I remember. I also changed the gear on the trans adapter to get the speedometer close. Since I put everything back to stk.
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It happened when I put the 2.68 in the back.Tom
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Quote:
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Plenty of interstate access in SoCal, but I don't remember mile markers during my driving experience there in '05. The 5, the 101, etc.
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Easy enough to run with someone's, 'correct speedo' for 5 - 10 miles and check it.
If it is 21% off, 5 miles should give you approximately a mile difference right? Frank |
2.68 ! You are ready to go cross country now!
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I have and use a Speedo app on my phone.
No guessing... |
Rather than changing the drive gear in my transmission,I bought this https://www.cpttransmission.com/.I called and told him the percentage is was off,and when it showed up it was dead on vs a GPS
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that site can not be found?I have the speedo diff down pat,im not sure about the odometer yet.I have a couple gps apps.Tom
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Thanks,I have found a few sites that sell them,found a 20% unit.For me to use it I need to also install a 45 degree as my ST-10 has the speedo cable going in the pass side of the trans.Not sure if they retain the same direction yet or reverses it.Tom
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