Product review (4 stars): Fits fine now.
This tray is shorter, front to back than the original part from my 1987 Whirlpool refrigerator.  This is not a problem, just slide the tray all the way rearward when installing it.  Also, it was about a half inch too wide, and was binding in the opening.  So I trimmed the left side flange with some scissors.  Fits fine now.