I use the same method with the hammer, I just use a socket and pound on that. Starting it staright in the bore is key, you don't want to have to pound it back it out. Tap (pound) around the edge of the socket and it will go in. Some of the ball joints don't have the groove for the snap ring, so you will be pounding on it waiting till the groove shows up, which it never will. I currently have this type installed (no snap ring), probably 75,000 miles still good.