Take the nut off and start soaking the center with some darn good penitrateing oil. I let mine soak for three days and it was still a bear to get off. I used a bearing puller so that I was pulling on the whole bottom of the center but you have to be careful of you'll damage the steering wheel. The steering shaft is splined and tapered, it and the wheel seem to rust solid together. It'll take some time and patience.