Product review (4 stars): Slight mods
I have a Kenmore 106.55614400.  This Track is not exactly like the original.  It has a little protruding dimple at each end that tend to hold each end out so you have difficulty sliding it forward into the lock position. I used small wire cutters to clip off these "bumps".  This new track was very difficult to slide into place compared to the old one.  I could not slide it into place with my hands and had to remove the entire shelf and use a hammer to tap the track to get it started and then could slide it so it snapped into place. It does work like new.