I need to replace just the spindle, I took the nut off the back of the spindle and I cannot knock it out. Do I need to add heat or does it press out?

The one I worked on was designed to be replaced as a complete unit.

A good soaking with penetrating oil, and perhaps some heat. I wouldn't expect it to come out easily.

I've seen where they're fixed in with Locktite stud & sleeve locker. Warm it up with a torch and hit it with the flat-faced tool in an air hammer. I wouldn't beat on it with a big hammer.

Thanks guys, I soaked it down last night with some penetrating oil and again today, couple big whacks with a large hammer and it came out...