I have a 4 year old Maytag washer which has recently begun "walking"
around during the spin cycle. It moves several feet from its original
position.

The washer is carefully levelled and the feet are making solid contact
with the concrete floor. The levelling from side to side and from front
to back has been checked multiple times and appears essentially perfect.

The size of the load and the distribution of the load does not seem to
make much difference, if any.

This has just recently begun, and the prior levelling seemed to keep
the machine from "walking" for the last 4 years, even with several
loads per week of use.

Are there vibration dampers or other parts which wear out? Are there
other things which can be adjusted "do it yourself"?

Thanks in advance for any suggestions or advice.