The spedo cable came undone up behind the spedo.  How to get at that darn thing?  So.  I looked it up using the advance search feature and wallah there I found how to do it.  From start to finish maybe 20 minutes.  Got to love it.   
One trick to try out - the nut holding the cable on to the spedo kept slipping down.  Couldn't feed it up through the channel.  So.  I take some plastic tape, run a turn on two on the cable below the nut, and there it was when I wanted to screw it back in place.   
So.  The search feature saved me from asking a question that had been answered already.