Product review (5 stars): I didn't know or have a good look at what was wrong until I had the ...
So this was the problem with my Whirlpool washer shaking way out of balance during the spin cycle.  I didn't know or have a good look at what was wrong until I had the tub off and additional parts in hand to replace.  This was definitely the main issue since two of the three pads were broken and all three pads were worn very thin.  Since I had the machine apart and didn't know the exact issue, I replaced these pads, another set of skid pads, and all four springs.  I also cleaned years of junk from the inner and outer tubs.  Then cleaned and painted rusty areas.  Works almost like new!

If I had to do this over again I would start with replacing just this part firs.  Without removing the tub by using a block of wood to wedge up the skate plate for access.