I have a question about the PTO on my Super 77.  When I engage the PTO when a heavy load (bush hog) I can hear what sounds like a bad bearing up at the front of the transmission.  The noise is only there when I first engage the PTO, after the mower is up to speed the noise is gone.  It doesn&#039;t make any noise when I use the tractor on my sprayer.  Any idea would be great.  Thanks John.