Product review (5 stars): Why wasn't this used in the first place?!
This was a perfect replacement of the factory mechanism, which was flawed and poorly made.  Whatever happened to the days when you could buy a large appliance and KNOW that it would last for 10 years.  The original parts that held the upper rack broke after 2 years.  After some research, I found these online.  They fit perfectly... you just have to use the youtube video for the easiest directions.  Now, the top rack is much more sturdy than it was with the original equipment.