Not a difficult job, but if you're going to replace the bearing and all while you're at it then you've got to be sure that the retainer is sitting just right or it won't seal properly. I had a real time with the shop I was dealing with, they couldn't get it right at all. They originally just assumed everything pushed tight up to the bearing. Anyways, some people have used Drcoffee's method and had success, others say he's wrong and toyota is right. You can choose. Either way he's got some measurements and all...