1, Screwdriver to flip the silver coloured bit on the top.
2, Hacksaw to cut the rubber outer and then rip it off.
3, Hacksaw again, this time on the white plastic bit holding the gear knob to the stick. I did it in a lot of small pieces until it was done. It took some time and clearing up after but seemed the easiest way if you don't want to keep the gear knob.