I wouldn't sweat the noise. It is not going to hurt things to let this go. The transmissions on this machine were quietly reconfigured mid production, so any new parts installed on this machine will be an improvement over the original ones. I also do not recommend buying a new machine necessarily. That's what Maytag is counting on...
some of us call it 'planned obsolescence'.
You can get the service book for the Atlantis from one of us, so there is no reasaon you can't keep this thing around awhile.