Thought I noticed this coming across the Isle of Skye the other day, but after a couple of runs up and down the Uists these last few days I've now noticed it a lot more.
If I'm holding a steady speed, somewhere between 40 and 50 it seems to happen, then for no reason whatsoever the smooth engine note will seems to become jolty and the rev counter will bounce up and down a little, and you might lose 1-2mph. Yes the roads are bumpy up here, and yes it's been blowing a gale, but this is not my foot bouncing on the throttle.
Will try it out tomorrow in cruise control mode to test theory, but it's almost like the car is jumping up and down between gears and can't decide what gear to be in. I don't recall it every doing it before the last week or so.
Engine has 11k miles on it. Car is 9 months old.
Any clues?
Video to view:
https://www.dropbox.com/scl/fi/z0pj5p8p9og...6&dl=0
Any advice much appreciated, as my limit with cars is doing the fuel, washer fluid and air in the tyres! For anything else, I have to ask....