I've got a similar issue, but the opposite - on deceleration, and ONLY between 100 - 70kmh, I hear a whining noise, dropping in pitch as I decelerate (foot off pedal), and disappears at around 70kmh.... BMW Dealer told me it is 'normal' for older cars (full service history and 140,000km).
Has anyone else experienced this?
The gearbox oil has yet to be replaced, would it help to replace that?
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