Speedometer cable noise

I am no pro on this and after a head injury I forgot alot of things. Make sure you have the right cable for the year because there are different ones. If you have the right cable and you know you installed it right in the dash then the cable is not properly indexed into the transmission. This will allow the cable to spin but not enough to move the needle. It will sound like a vibration in the dash and drive you nuts. Move the cable at the transmission so it will lock in where it should be. Or go on the Transmission forum and see if a tranny guy can give you a better explanation or description on how to fix. Then will see if your speedometer is on or off. PM if I can be of any assistance.