I was cutting a yard and it started to make this horrible noise like I had ran over a stick, almost like the blades were hitting the side of the deck. I brought it to this one guy who used to work ata toro lawnmower store and he said it was the spindle bearing. My dad and I got down there and took the belt off to spin the pulleys and there wasnt any resistance when we did so. we figured if its on the inside under the deck, we better start taking it apart... well, we couldnt get it off. Deos this sound like a spindle bearing problem? It only make the noise when the blade is engaged.