Strange, my mower did not make any noise tonight.Maybe I ran over something like a branch or something yesterday..I had the deck replaced last year by Sears it was still under warranty so it was free otherwise the charges would have been over $1200.This year I bought replacement parts on Amazon.The deck was in ok condition so I did not replace it.I also put heavy duty rings on the top and underneath the deck to keep the vibration from tearing the deck apart like a worn out spindle did last year.I only have 60 hours on this mower.