A-Arm Problem

I have never had any problem removing ball joints with the hammer method, a couple of short, sharp, well positioned blows and it is loose.

It is a good idea to turn the nut over so that the castellations are down so that if you do miss they are not damaged.
 
The thread on the ball joint is very soft. I was struggling to get my a-arms off the spindle and ended up striping the thread on my one ball joint. X(
I screwed the nut on and tried to tap (not banging) it out with the smallest hammer ever and end up striping the thread. I have never ever seen thread that soft. What ended up working for me was to put the a-arm in the vice and tap the spindle with a hammer.
 
I may have explained this poorly, I am in no way advocating that you strike either the nut or the thread. In no circumstances should this be done.

The idea is to only strike the part which the tapered shaft goes into, resulting in distortion of the tapered hole into which the ball joint shaft fits.

This will allow the shaft to fall out. The idea of keeping the nut on is to stop damage to threads if you miss.

It is possible to leave a socket on the nut to stop damage if your aim is poor.
 
I had the same problem. The top one came out bit the bottom was stuck. I put the nut back on the top one till the threads where even with the top of the nut. I put a scissors jack between the a arm and crank some pressor on the a arms. After getting it real tight, I hit the spindle where the ball joint gps in with a hammer and it popped out.
 
I put a scissors jack between the a arm and crank some pressor on the a arms. After getting it real tight, I hit the spindle where the ball joint gps in with a hammer and it popped out.

I:I Good thinking about the jack, but you don't need to go to the trouble of putting a jack in there, after a couple of thumps with a hammer it will pop out by itself. :)