My newly acquired 1998 728i seems to have some sort of strange gearbox issue in that it works absolutely fine in all gears in steptronic mode, but when left in auto it seems to have a mind of it's own.
When driving along much above 40/50mph it seems to have a hard time deciding which gear to stay in, and hunts around between (I think) the top three gears. When driving home in the rain tonight it was doing this for the first few miles, and then after a while the orange DSC light came on and then it seemed to want to stay in fifth gear but didnt seem to want to change down for hills and certainly didn't want to kickdown at all - just builds spedd slowly.
The changes all seem to fine, no sign of slipping. It just cant make up it's mind when it wants to do them!
I don't seem to have any gearbox warnings on the dash, and the car has done 55k.
Does anybody have any idea what might be causing this? I'll get it put on a scanner later in the week to see if there are any fault codes stored, but in the meantime, any ideas would be useful. It feels to me like it's some sort of electronic issue somewhere, but my knowledge of Auto boxes is limited!