Had another crack at this bolt today....here's how I went.





Went down the heat up and crack bolt path - also liberal sparys of penetrant, tighten then loosen...sadly nothing worked - temporarily I'll admit defeat as my get Blue Coupe running deadline approaches.

So can you REALLY fill transmission fluid through where the gearstick is usually mounted - I've had a look and there doesn't seem to be much room for the oil to get into the extension housing...