Interesting. So I've read the tech service manual Re the work for the Rad and it states you should drain the gearbox and refill post rad change. Seems some dealers do it and some don't.
I've rang 3 places so far. 2 took a deep breath saying we don't advise touching the gearbox as its sealed for life. If you try to replace the fluid we will not be held responsible for any damage caused to the box. Waiting for the other one to call me back.
Very and we will never get a straight answer tbh. If you order the later car one and it doesn't fit you are stuck with it. But I don't see why it shouldn't as the block etc is the same.