speedometer

hey my speedometer and odometer do not work any ideas as to what it might be. its a 95.5 isuzu rodeo . i have replaced the gauge cluster but it still did not work..any ideas?

I beleave there is an electronic sending unit on your truck

Pretty sure you have a nylon drive gear for the speedo cable. It should be somewhere on the tranny tailshaft. Check that out to see if the teeth are gone.
G/luck
Joel