I have the Neptune washer (MAH4000AWW). I replaced the bearings in early 2010. I noticed at the time that I have the "good" wax motor.
The issue I am having now is that sometimes (not always) the washer will stop mid cycle. It doesn't always do it at the same place. Sometimes just before the spin cycle starts, sometimes just after one of the spin cycles, sometimes after several spin cycles. If I hit the start button, things will start again. But, sometimes (not always) it will stop again after the next spin cycle or two.
Not sure where to look or what to consider. It doesn't have any real rhyme or reason to it. I have tried larger than normal loads, smaller than normal loads, hot water, cold water...and no changes. Sometimes works great...others not so much.