If you are talking about replacing the axle end bushings of the UCA, its actually pretty easy. After many hours of messing around with all sorts of dumb ideas, I figured out how to do it in about five minutes.
1. Use a half inch drill bit to drill out some of the rubber right around the inner sleve. The bit will want to run around the sleve - let it - it will loosen up the rubber.
2. Pound out the inner sleve - should come right out now that the rubber is lose
3. Use a screwdriver to pry out the rest of the rubber.
4. Use a sawzall, hacksaw, or something to make one slit in the outer sleve - try not to cut into the housing too much.
5. Once the outer sleve is cut, it will pop right out.
6. Sand down the housing a little bit and pound in the new bushing.