Car is a 1994 Grand Marquis

The odometer hasn't been working for awhile, then recently the trip meter called it quits.

Looking to find out whether they are mechanically driven or use a electrical sensor.

The speedometer does work.

I have seen a few things online, where people are suggest there is a stripped gear inside the cluster, but that doesn't explain to me how the odometer stopped working and THEN the trip meter stopped.

Any help is appreciate, thanks all...