Product review (5 stars): Go ahead, do it, buy this part and fix your washer, because it's that easy.
Part Trader - Fast Shipping (FEDEX!!) and easy purchase of course. The part fit and now my washer sounds better than new.

The part - The rotor assembly appears to be redesigned. The original part, looking at the "gear" or teeth, was both white plastic and some kind of black material. It was stripped out, so the rotor would spin without the tub. It took over 5 years for this to happen. As such, I even ran out of our extended warrantee. (Good Job LG - Sarcasm) It would appear this is meant to happen and is a sacrificial part of the rotor, for two reasons. 1) To prevent motor burnout I guess. The motor has a 10 year warrantee. 2) To make a few extra bucks. Sure they could sell a piece of plastic, but no they have to include the magnets and half of what makes up a motor. I digress. The new part, made, May 5th 2015, is "brand new" The entire gear teeth is made out of this black material, about an 1/8th inch all around. Significantly more than what was on the original component. Therefore I hope this is a permanent fix.

Conclusion - LG offered a 10 year warranty on the direct drive motor. However In all my motor experience, the rotor should be included in this warranty. Regardless, the cost of the part, and ease of repair, it is still cheaper than messing with the warranty. According to our repair guy, over the phone, he suggested the cost would be around $140 for the repair, which included an $80 diagnostic, applied to the final bill - if under warranty. Fair is fair, he needs a job, but not while I can do it. I feel duped, from the standpoint that LG engineered the washer this way. If they sold the plastic part for $6, by itself, I would sing praises to them. But, no, they didn't do it. The MSRP of the part is $100, and we are getting it for little more than half that. Which means the repair guy should charge about $300 for parts and labor.

It's not a $300 job, if you ask me. It's easier than changing a tire.