Around 6 months ago, I was hearing a slight vibration type feeling under the car when accelerating only near the start of going up threw the revs, the feeling of driving the car on the rims with a flat tyre but underneath the middle of the car.

Didn't really pay much attention to it as it only occurred briefly occassionally when setting off, but driving around yesterday the vibration/noise has gotten significantly worse, the harder you accelerate the more the noise/vibration occurs, I now realise that this loud banging noise is coming from or near the gearbox, as the automatic shifter moves after each noise.

I've read that this may be a thing called clutch chatter, the car has done 151k miles and does need a service, any guidance before I take it into a garage? At this point i'm thinking it'll need a replacement clutch and it's going to be very expensive.

thanks