If you have already stated this, my apologizes. But
did you follow the wire from the solenoid all the way
up to your shift box? Even if it is sleeved, I woul pull
the sleeve off and inspect the wire. There is a funny
little area on the passenger side of the tranny where
the solenoid wire splices into a new wire. I have had to
replace that before. As you know, it is dirty and greasy
under there, but I would give a hard look at that wire
if you haven't yet.

---Joe HC
--
1977 244 160k (?), 1990 244 102k, 1978 Fiat 124 Spyder (restoring)