Hi guys.
Not sure if this is a problem or not but when sitting on the motorway with the cruise on and sometimes without too, if the car starts to go up an incline it seems to drop a couple of gears for no real reason, then hold them. Before it changes the engine note varies slightly as the engine obviously works a bit harder to get up the hill but it seems to be fine and can tell from the noise it's by no means working that hard. Then all of a sudden it'll drop down a gear or two and the revs will shoot up to about 5k RPM but once we get up the hill and go down the other side, it won't change up again for ages. I have to turn cruise off and leave my foot off the accelerator then it'll decide to change. Feel it click up a gear then feel the transmission lock up.
Does anyone have any ideas? I'm going to get the fluid changed (any recommendations?) the week after next. Is this the sort of thing that would be cured by that and an ECU update if there is one?
Cheers