Maytag Performa washer making clicking sound?

1998 Maytag Performa PAV2000 top loading washing machine

All machine functions seem normal, but there is a clicking noise during any agitate or spin cycle. Since the noise is there during both agitate AND spin, I assume it is not pump related. The volume of this noise fluctuates randomly, sometimes loud and sometimes not so much. The frequency of the clicking does slow proportionately if a slower agitate/spin cycle speed is selected (gentle cycle). The noise doesn't appear to degrade performance in any way that I can tell, but I am concerned that if we continue to use it in this state it may cause damage of some sort to the washer, making things worse.