Most likely the bearings.
I just had a 2008 suzuki swift gearbox overhauled as it was making an awful noise. It cost £350 at agency transmissions in Worcester and was done in a day. When I went to collect it he said "I've been doing this 50 years and that was the worst gearbox I have ever seen, it was about to take the whole casing with it" they changed literally everything inside even the oil galleries.
Can't fault the service at all, so I bet they could do your m47
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