No. That was JD answer to it coming out of park. Our 2440 did not have that. When it was recalled to have it installed my grandfather signed off a waiver not to have it. I hear those have issues. When we parked our on the hill to unload sap you made sure it was in park. It never came out. But I could bumping the lever getting off could have tragic results. There was a slight detent it sat in when in park.
It looks like JD created a Park Lock Assurance Kit. See the PDF file in my second post. I found that after my original post. I was hoping that there was something I could adjust or replaced, but I might need to see about getting that kit. Otherwise, I just need to not park it on a hill and rely on the PARK setting of the shifter.
After rereading your post here are my thoughts. Don’t update it. Leave as it is. When you put it in park. Don’t just push the lever straight up and leave it. Make sure to move it straight up and to the right. With the lever there pull it straight back. It should not go to neutral. If I recall from my childhood. Those updates had an issue with releasing the range lever.