Pulled in to a quick stop station to get milk and when I shifted to park, Shifter stopped in reverse and wouldn't move in either direction. After a bit of playing, I found the retaining clip for the center rod of the shifter was missing. Without the center rod lifting, it won't move out of gear. I was able to get the rod up enough to get back into gear and drive home. I found another clip, just a shade too big, but was able to bend it so it stayed in place.