The 1/2 shaft dosent need to come out.But get an upper B joint also.I just did them in my Durango.Take the brakes off.Undo both ball joints and lay the spindle on the frame.Then just move the shaft forward and you need a press to get the ball joint in and out.The upper shoud be rivited and you have to chisel the head off and bolt the new one in.I just had to tap a little crimp off my bottom ball joint.They have a snapring that goes on the new one and some of the old ones also have a snapring.Just make sure the new snap ring faces inside or the knuckle can pop it off.I did all 4 on mine in about an hour at work.The press can be rented at like Advance in their loan a tool program.Id use either TRW or Moog.My upper was looking good until I pulled the lower so I changed them all.Rocky