Product review (5 stars): Working well
This new unit is working well. I believe the propensity for this rotor to strip out, relatively soon in the washers life cycle, may be related to a designed in shearing ability.  In the event the wash drum is jammed, the center hub splines give way. It would be nice if the center hub alone was available to replace. So wasteful to toss the whole unit due to the stripped center hub. Although, there may be balance issues that need to be made right during assembly at the factory, which would be challenging to do in the home.
LG was worthless in helping me get the part under warrantee. It had to be a big production with time off work and parts to be ordered by a serviceman. I had this part delivered in less than a week and was back up and running.
Along with blue "thread locker" on the cover bolt, I used a few drops of thread locker on the splines to take up the sloppy tolerances. I torqued the bolt down to 20 lbs and let it sit over night.
Don't wash any heavy cotton bath mats that may cause the washer to try and balance the load. I suggest washing like items so they can distribute evenly and hold water at about the same rate.
When your washer attempts to loosen an out of balance wash load, it does quick direction changes, which are murder on the splines.