Odometer does not work on analog gauge

[Aerodan]

Just purchased a beautiful 91 Town Car. Second time out the odometer and trip odometer stop working on the analog gauge. The speedometer and cruise work. I have the 91 Electrical & Vacuum manual but not the shop manual. Elect. Man. Refers to section 33-10 of the shop manual for diagnosis on the 17282 speedometer assembly. I don’t have the shop manual yet.
Any help is appreciated

 

[Action]

If the speedometer and the speed control work, the speedometer cable is spinning and going into the speedometer assembly. (Base part # -17282-)

If the odometer and trip meter are not working, that would be internal to the speedometer assembly.
The speedometer assembly would need to be removed for further diagnosis.

For that older Town Car, the odometer and trip meter are mechanical.

Action

 

[oktowncar]

Usually the plastic worm or drive gear split then break apart over time.
You can look online for cluster repair services that may still offer analog repairs or attempt to do the repair yourself
Salvage yards with like year parts can be used or you can search for .STL files online and possibly 3D print your gears needed