Been thinking about this for a while now, hoping someone can help (although I probably should know myself), my original 850 engine (reconditioned and in good condition) but it has this very loud whine. I remember my first mini, also an 850 was a bit whiny too, but nothing like this. You can hear it really clearly in this clip if you jump to near the end around 5:50 where it’s taken from outside the car. It was really loud inside though and through every gear under load - both backing off and accelerating. Just wondering if it’s diff, gearbox bearing somewhere, or primary gear. I would normally say diff, but not sure on the mini.
https://youtu.be/Nb0IUrY0u-w
