Product review (5 stars): Back to its old, quiet ways
Our GE washer is about 9 years old, and this is its first major repair.  We also had terribly loud noises (GRONK,,, GRONK... with a metallic twang) and considerable spilled water. This item fixed these problems. It comes with an instruction sheet (it's a little vague) and a new tub seal. As several people have said, you will need a special wrench (or a monster sized deep socket, if you can find one) to remove the center nut. Due to SEVERE corrosion of the nut and shaft, we had to beat the wrench senseless with a full sized sledgehammer to remove the nut. I recommend getting a new nut, washer, and split washer when doing this repair.

We used the service manual for detailed instructions, and also referred to a couple of YouTube videos when trying to determine how to safely break the spinning basket apart from the plastic tub, again due to the corrosion. I expected to be done after one evening, but it took several more hours to deal with the crud on the old shaft.