Prop shaft noise.

[Jeff.Bernstein at pneumaticscale.com]

Make sure the grease in the prop shaft CV joints is there and is fresh and
not dried out.  My shaft would make noise too and when I took it apart there
was barely any grease and what was there was dried out.  I cleaned the old
grease out and put fresh grease in and the prop shaft and it has been fine
ever since doing it about two years ago.

Jeff Bernstein
Canton, Ohio