I should have been more precise, sorry! It's actually inside the track, it's shaped something like this: |--|--|. It's approximately 6" long and 1" high. Does that help?
Answer Hello Dee! Judging from the diagram it seems that the wheels are the only plastic piece that is within the upper track. If you can repost with your e-mail address in the question body (we will not post this) and I can e-mail you directly so you will have my direct e-mail so we can firgure this out, possibly by sending pictures, etc. Thanks Dee!
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I need a wheel for the top rack. I don't see it on the diagram. I also need the screw that holds the wheel.
Answer Hello MrFixIt! The upper rack wheel is not available separate from the adjust assembly. For the left side adjuster assembly use part number W10153528 and for the right side adjuster assembly use part number W10153529. Thanks!