MILEAGE CABLE on a 67 impala

Hi Im new to this site. Anyway I have a 67 impala 2 door fastback and i cant figure out why my millage wont turn over anymore can it be stuck or something? I got a new cable but it still dosent work. Is it something in the dash that is stuck ? The speed works good. But milage a no go. Any suggestions?

Sounds like the odemeter is broke it shouldn't be any problem to replace.

Where can I buy one parts store? Like autozone or pepboys or something? For my 67 impala? Odemeter stuck wont move at all