Train Whistle cont'd

So the truth of the matter is, that I am not so smart.  Oh, you knew that didn't you?  The train whistle noise was a motor noise, true.   But it is a bearing noise and one drop of oil strategically placed will cure it.  I did not strategically place anything.  It placed itself.  Someday when I can I will take apart the motor again and figure out where the strategic place is to drop that oil.  Until then I am grateful that the noise is gone.......