David,
Just a question. When you were fighting with yours, did you try putting the gear in the transmission and turning it with the cable disconnected from the speedometer? It seems that when ox_ford_guy does this with his, it just turns freely which would indicate it is not meshing with the gear in the tranny as he shouldn't be able to turn it at all. And with it not connected to the speedometer, he should have plenty of slack to get it seated all the way down in there.
Ron