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Should read "...speedometer and odometer don't work..."
I have the same problem on an '89 Dodge Dynasty. I am told that the odometer and speedometer in my car are driven by separate cables and that I simply need a new cable for my odometer to function properly again. I have not verified this information, but it might get you on track.
You can not legally.
you can go to speedometer and out of speedometer
I have a 2001 Dodge Stratus Coupe V6 and mine is a digital odometer located right under the speedometer.
A 1991 dodge dynasty speedometer bouncing could be a sticking speedometer cable, or a bad drive gear. Check the cable first, and lubricate it to see if the problem stops.
The odometer has failed.
If you open the odometer, there are two small plastic gears. One is connected to the speedometer, the other to the odometer. The speedometer gear drives the odometer gear. In all likelihood, one of these gears is missing a few teeth. I have the same problem with my Ramcharger, same year.
check speedometer cable for possible disconnection; it comes out of firewall and goes to transmission
press the knob on deshboard near speedometer and hold for some time to reset the odometer on any vech. with electronic meter
Either the Speedometer itself is bad or the speedometer cable is. either one isn't too difficult if you have pulled a dashboard out before.
it usually is the gear in the transmission Could be the vehicle speed sensor.