[Spits] speedometer stopped working

[Grant Buss]

Hello
My speedometer stopped working properly a few years ago. Now it is sort of
right at one point (around 60) and the further away from that point the more
different it is, compared to my GPS.
I have changed speedometer, cable and the 90 degree connecter. I think the,
whetever in the transmition is not working. I don't want to take the trans
apart,unless it is a simple fix. I think you can't buy the part.

Some place I heard or saw someone used an electric speedometer that used a
pickup near the end of the driveshaft to sense the revolutions. Does anyone
know of this ???

Thank you
Grant