Product review (5 stars): ... a new spider made my LG washer almost as good as new
This in combination with a new drum seal and a new spider made my LG washer almost as good as new.  It was vibrating so bad it was walking across the floor.  I was not 100% sure if new bearings would fix the issue, so I took a chance.  I figured if I had it apart, I might as well replace the spider as it's a common part that breaks.  After disassembly, the old bearings weren't visibly bad, and the spider wasn't cracked as some have said.  I did clean lots of scaly crap off the outside of of the stainless tub with a metal scraper.  The bearings aren't the easiest to get out, so don't be afraid to bang on them.  Just don't damage the plastic tub.  The new ones went in fairly easily with a little dish soap around the outer edge.  Reassemble and test.  Voila.  No more excessive vibration.  I can do a big load of towels or jeans and not have the washer sound like it's coming apart.