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Car making a strange noise under acceleration

I have got a small problem with my Vauxhall Astra; while slow acceleration it makes a metallic klunk noise the from the engine. But under hard acceleration, it's fine. There is also no warning light or fault codes. Any ideas?

Asked on 31 December 2014 by Piotr

Answered by Honest John
Reads like a driveshaft joint.
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