Oh yeah, the "swishing" is a lot like the "bad input bearing" sound on
the John Muir Engine Sounds:

http://www.ratwell.com/mirror/Muir/Muir.html web page

http://www.ratwell.com/mirror/Muir/bisb2.wav sound file

Will.

On Fri, 2009-11-06 at 14:58 -0900, Will Taygan wrote:
> Didn't get any response a few days ago, so this is an updated/extended
> repost.  I've been searching the archives and poring over wikipedia, but
> am still looking for opinions. :)
>
> 1982 1.6NA diesel Westy 4-speed with MT-90 in the tranny.
>
> Key points:
>
> 1. swishing sounds from the tranny in neutral when clutch is let up.  No
> sounds when pressed in.  I notice a little drag on engine when the
> sounds occur.  Assume throwout bearing good.  Assume input shaft bearing
> going out? - maybe just 3/4 bearings?

-snip-