Noisy Steinway Wippens

[A440A@AOL.COM]

>Came across a 1975 Steinway with teflon bushings today.  Wippens in the
>bass  >area were especially noisy.  Almost sounded like wood banging against 
wood.
> After tightening all action screws in the area, the noise was still there.

Greetings, 
     It is possible that the proximal edge of the jack is hitting the 
underside of the hammershank flange.  There are many other wood to wood 
possibilities, but that is about the most unexpected one I can think of, and 
it had stumped me on a Steinway of this vintage several years ago.  
Regards, 
Ed Foote