Mechanical
odometers have been counting the miles for centuries. Although they are a dying
breed, they are incredibly cool because they are so simple! A mechanical
odometer is nothing more than a gear train with an incredible gear ratio. Some odometer has a 1690:1 gear reduction!
That means the input shaft of this odometer has to spin 1,690 times before the
odometer will register 1 mile. Odometers like this are being replaced by
digital odometers that provide more features and cost less, but they aren't
nearly as cool.
Testimonial: "thanks"
The functions are either mechanical off a gear and cable to a gear driven speedometer head or electronic off a signal generator that is run by a gear. The year and model determine what it is using.
When if
you exceed the limits of the odometer, in this case by driving one million
miles, the odometer will start again at zero. Before the 6 digit odometers
became common, you would see many cars that were over 100,000 miles and the
odometer had "turned over". Million mile odometers were not common
until the early 90's, so you will still see cars with the 5 digit odometer!
If there are any problem in your odometer, you can
fix it by the a Odometer Correction Tool
Like the DP3 Digiprog3 :
http://www.xcardiag.com/wholesale/digipro3-odometer-correction-tool-mileage-tool.html
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