strange noise - Kirby G3

[thunderhexed]

Ok, so now my G3 is making some sort of low pitched growl-like noise when I use it. Everything seems to work fine, but its becoming more and more pronounced. Is that what it sounds like when the bearings start to get dry or go bad, or could it be a prob with the transmission?

 

[vacuumfreeeke]

My G5 makes a growl even when in neutral though it's obviously the transmission though it's not too bad. It's just like the tranny is still trying to engage when even when it's in neutral. Does make the noise when you are pushing and pulling it, or just when it's stationary or all the time?