Shirted into reverse and heard a pop, shifter wen limp. Could access R/N/ and Drive, could start in nuetral. Brake lights work. Looked at cable and arm on trans, no problems. Disaasembled column housing, saw nothin unusual but foiudn a chunk of whit eplastic. Reassembled and it went into Park! Now I can't get it out! Tried the usual games with the key/brake pedal and shifter. The "word clock" is out on this truck, would that effect it? Any help appreciated, at this point I just want to get it to a mechanic. Thanks!