Originally Posted by alcjphil

Do you mean changing the whole hub? Changing a hub requires that you remove all the spokes and completely rebuild the wheel. I have done this, but I have built dozens of wheels. You might also have to buy all new spokes if the hub flanges are a different diameter. You also have to make sure that the new hub has the same number of spoke holes. This isn't a job for a beginner. That new free hub body might seem like a bargain if you have to change spokes as well. Asking a bike shop to change the hub would cost quite a bit more than a new free hub body