clutchdustIt could be early signs of diff failure if its like a sort of loud clicking noise. A knocking is usually caused by loose anti roll bar clamps or worn antiroll bar links (or both).27th-November-2007 22:39
Today I found out what the clicking and and knocking was on my TD6. On my home from Newcastle on the A19 at around 65mph I heard a loud clicking and then a very high pitched metallic scream, then I lost all drive and stumbled in a layby. After a quick check from the AA man he said the diff was shot.
So I had it recovered to my local stealers and I have got my chequebook on red alert
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Happy days