Speedometer correction?
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From: South Central Boise
Speedometer correction?
Is there a part you can add to your speedometer cable to display the correct (or as close to it as possible) mph speed with tire and gear modifications?
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Years ago when two speed differentials and after trans overdrive units were more popular there was a device to install in the speedo cable that was 1:1 ratio and could shift to a 1:"to whatever was needed" ratio so the speedo would work correctly. It was an electrically or vacuum shifted device depending on how the OD or Diff was actuated.
Check with a speedo shop or a large truck shop to see if such a device is still available. You get the needed gear ratio put in it and always leave it "shifted" to the alternate ratio.
Check with a speedo shop or a large truck shop to see if such a device is still available. You get the needed gear ratio put in it and always leave it "shifted" to the alternate ratio.
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