Yes there is a plastic piece that is broke inside the shifter tube. When you press in the button it is suppose to release the lock mechanism to allow you to put into park. If the plastic piece is broke it will not allow you to put in park. Bad news is that Chrysler does not sell just the part that has to be replaced and you will have to replace the entire shift assembly. How ever I was stranded and did a quick fix that can be found on you tube under 2004 jeep wrangler shifter quick fix. Where I took a plastic pen and cut it to size and placed it in the shifter.