Then next step is to remove the shift lever retainer cap. The cap is spring loaded and the spring presses it into interlocking pins. Use a shop rag and press down and twist the cap counter-clockwise. Once twisted far enough, the cap will clear the pins and pop up as shown below.
The entire shift lever assembly will come out in one piece.On the very end is the shift lever cap made of nylon. This too will be replaced. Above that is the shifter ball. Inspect it for burrs and rough edges. If there are any, gently file or sand them down smooth. Otherwise, you'll damage the new seat.