[s-cars] Viscous fan clutch bearing - replacement?

[Thompson]

Is there a bearing on the viscous fan clutch that can be
replaced? I think I can remember swapping in a new one on my
ex-//S4 back when a few years ago. The fan clutch on my //S6 is
a bit wobbly back and forth and not spinning that fast when you
first start it up (cold) and really spins about the same when
it hot. Maybe I need to replace the viscous clutch at the same
time too? What's the part # on this?

Other item that the Audi gods inflicted upon my soul is the AC
compressor knocking starting at 150k. Toggle the AC on and rev
up to about 2-3000 rpm there is a constant knocking with rpms.
Toggle it off, the knocking goes away. Magic. Anyway, the mech
at the shop here at work said to start with a new viscous fan
clutch.

TIA, Thompson
1995 //S6, 150k mi.

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