Hello! I own a 1990 Dodge Dynasty with 74k miles and one day, while I was driving, I noticed the odometer had stopped working, as well as the trip odometer, but all the other gauges were fine. I looked up how to repair it and replaced the two small plastic gears that are prone to breaking and causing this issue. I took it out for a drive the other day after installing the speedometer unit again and found that it still did not work. I plan to take it apart again and make sure I got allot the broken teeth from the previous gears out, but when I manually turned the odometer forward, it worked just fine. What else could be causing the problem?

 

step up motor in cluster

 

I'm assuming that's the motor that turns the gears. Where can I get a replacement? If I can get a new one rather than one that's already been beaten to death, that would be better.

 

If I remember correctly there is no speedometer cable. If that is the case you need a vehicle speed sensor. They should be available at any parts store.