I'm reviving this old thread because I have this problem intermittently with my SRT6 rescue roadster. Sometimes when I go to put the shifter up into park, the lever will not move beyond the neutral position. The only way I can get it back into park is to turn off the engine / ignition which frees the lever and I can then put it back up into the park position. It may function normally after that for some time or it may continue to do the same thing for awhile. It's obviously some sort of an electronic lock function that is affecting the shifter. Also this malfunction sometimes triggers the check engine light and puts the transmission into limp mode. Any thoughts on the cause of this problem before I go trying to replace the entire shifter assembly?? I'm going out to check for trouble codes and will update this post if I find anything.