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The mysterious fiches

In message <e42d64bf.34fc2397@aol.com> QSHIPQ writes:

> Given NO Urq's came from the factory with a LSD rear, I sure would start to
> wonder.

We don't know that.  I have 'ALZ' on the sticker, and 'ALZ' on the side of the 
housing - whatever's in the 'ALZ', it _was_ factory-fitted.
As I say, the parts microfiche says 'limited slip' but the drawing is not what 
I would normally recognise as such.  There _is_ a difference from the earlier 
differentials - there's a spring-loaded pin in the cross shaft (the one that 
carries the pinions).  I don't (yet) know what this does or how it does what it 
does.  As far as I can see, apart from slightly different geometry for the 
external lock actuator, there's no other difference.  A lot of the parts are 

 Phil Payne
 UK Audi [ur-]quattro Owners Club