odometer not work

Odometer and tripmeter not working, the speedometer and tachometer work.
What could be wrong? Chevy Venture ´99

If the speedometer works and the odometer does not accumulate miles, the Cluster needs to be replaced.

whether it not repair?

You can have it repaired or exchanged.

Now it became time to deal with the odometer, I took a meter off the block, loose screws, odometer engine itself was jammed shaft attachment slot tip, carving, and a bit .. is working. It is interesting that some form of narrow strips of sand paper fell from the odometer engine out of the socket??