It has the lock button on top, right? First thing is to remove that button. It has a couple of 'edges' on the bottom lip that catch on the inside of the knob, so you'll need to use perhaps a couple of small flat blade screwdrivers or similar to insert between the button and the knob so you can work those catches loose and remove the button. The knob itself is held on to the shift lever with a nut that you'll see when you get the button off.Still not sure how to remove the knob from the shifter... do I push the button down and turn it? There's gotta be a trick to it.
Thanks for the input!