Product review (5 stars): it is amazing that I have now installed new bottom and new ...
Amazon initially sent the wrong part.  My DW uses the little wheels not the big ones.  They quickly corrected the problem.  Both kits are identical except the size of the wheels. The seller included a link to a video that made it much easier. Not being a technically proficient repair lady, it is amazing that I have now installed new bottom and new top wheels.  My only issue is with Kitchenaid. I have the top of the line, but it has been the bottom of the line all accounts. This replacement part required me to remove my wine racks on both side permanently.  The previous adjuster had a different clip on the end where the wine rack was and it could not be reused with this part.  I tore one of the racks up just removing it.  The other came out in one piece, but there was no way that it could fit back in on either side. Living without the wine rack is better than picking up wheels off the kitchen floor every time I pulled out the upper rack. I now have Kitchenaid and GE on my do not buy again list.