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zf pl. 70k miles.
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  1. Technical Discussion. Limited to regular posters.
    slight humming noise Hi all, this is my first post so apologies if this has been brought up in another thread somewhere. I have a 3lt premium luxury diesel & i have a dull humming noise, which is noticeable below 50mph. it appears to come from the auto gearbox, anyone else noticed this?
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