Ive got one on my 3dr cosworth it's only done 400 miles & it's clicking, now my question is is this normal or is it knackered & is it worth having a slipper on a 3dr at all

 

It has a LSD as standard anyway, no it's not normal, although normally they "Whine", it may be worth checking the oil level.

Martin

 

when you say it's only done 400miles did you get it rebuilt or did you get it shimmed?

 

If you have a proper slipper fitted then they can click. It's the clutches moving. It will click on turning left or right. Depends on what type it is and what it's set for.
Make sure you have the right oil fitted, it may not be the standard oil for the Sierra.

 

Had it built m8