this is from a site for the pistol grip shifter replacement on an SRT8 but the removal should be the same for yours.good luck.

2. To remove factory handle: Carefully insert a sturdy blade at the bottom of the existing shifter handle
between the leather and lower bezel (silver bottom part) Pry it down, it doesn't take much pressure. Once the lower bezel is down, simply pull up on the knob and it will come off.