Product review (4 stars): Easy Repair on an Undependable LG Washing Machine
My LG front loading washing machine began making noises especially when the spin cycle was ending.  Eventually, the drum wouldn't spin at all even though the motor was spinning.  I searched online for the problem and found many people pointing to the rotor assembly.

It was easy to remove the metal plate from the rear of the machine and then remove one large bolt in the center of the rotor.  When I first checked the bolt I could move it slightly with my hand so I could see that it worked itself loose - this is probably why the gears stripped.  Poor install from the factory.  I could see that the plastic gears inside the rotor were stripped.  I thought it would be easy enough to replace the center plastic assembly that has the gears but could not find that part sold separately (maybe LG feels this part should only be installed at the factory for safety reasons?).  I ordered this rotor assembly and it arrived in two days with prime shipping.  It was easy to install but first I grabbed a tube of thread lock and put several drops on the bolt before tightening it down.  Hopefully, the thread lock will keep the bolt from loosening again.

I just want to add that this LG washer has been the most troublesome washing machine I have ever owned.  My previous Whirlpool top loader lasted for over 15 years with no repairs.  This one has the door seal that accumulates mold and smells - I have to use a front load machine cleaner every week.  Also, two of the cold water valves have failed (developed leaks) and they squeal when first opening.  Now I find out that LG used plastic gears on the rotor (probably to prevent damage to the drive shaft gears if the rotor were to loosen over time).  No more LG appliances for me.  The problem is that most, if not all,appliances are made really cheaply today so it is a crap shoot to get a good dependable appliance.