Hi Benz300, how it all started:
I drive a 20km trip between small country towns each day. (Live in one town and work in another). On this particular day, I drove out of town and everything was good. When I arrived at my work town and had to pull away from a stop, I noticed the early gear changes. No bang, no whine, nothing!

As I said, I have adjusted the transmission bowden cable - no change at all. Last night I climbed under the car and checked all vacuum lines as well as the point where the bowden cable enters the tranny and it seems to be firm (attached). I then checked the vacuum lines in the engine bay and also found nothing. I checked again while driving this morning and I can manually select all 4 gears. All change nicely, just far too early and almost independant of the throttle position. No matter how slow or fast I pull away from a stop, they change at the same point!

So, has anyone anymore ideas?