Thanks for the response. This was not something that came on gradually, but rather suddenly. I understand the logic behind your suggestion and will do a check on the CV joints. They do not click when at full lock so it may be the cage. I have done CV rebuilds and replacements on my 850 before so ...

Hi All,
Hopefully someone out there has had this happen and can advise what the fault may be.
This happened just recently. The car was purchased second hand at 132000Km and it now sits at 135500Km. Performed faultlessly apart from the dreaded swirl valve control linkage which I have now sorted and ...