Speedometer Cable for 1980 Transam Auto_Non Turbo
 

Thank You for letting me join this forum.
I am the original owner of a 1980 Trans Am, 4.9 (301) automatic engine, TH-200C Metric transmission. My speedometer cable has recently stopped working. I have gone on the rock Auto and other web sites to see about buying one. my problem is I do not know the original length. would someone who has the same year and car know what length to buy?
How hard would it be to remove from the transmission and from the underside of the dash?
Any help would be appreciated.
on some other site I saw the cable should not be greased. But my Haynes book says "When installing a new speedometer cable core always lubricate it the entire length with special lubricant designed for this purpose. Do not use oil." What difference is the core and the wire?

Thanks Mike