i have an 82 trans am that i swapped a 350 into, now i dont know if the speedometer has ever worked since i bought the car non running but the speedometer doesnt do anything when i drive it. the cable is good cause i put it in a drill and ran the speedo up. is it a bad speedometer gear?

 

Stripped or missing gears.

 

ok ill have to look at that and see if they are stripped, if they are stripped or missing how hard is it to put a new one in