It's still in warranty... so not taking anything apart. I'm talking about the little gear between the chain and the motor housing (not sure how else to describe it). It seems to need a few drops of oil every once in a while to quiet it down (nothing broke... just moving parts). It would be nice to get some grease in there (I think) to be a little more permanent... but maybe that would just attract more dirt. Hmmm... I'll have to look closer.