aztek shifter it not going into park or drive 1&2 on 2004 Pontiac Aztek

you can drive the car around and it feels like the internal button on the shifter is jumping up and down randomly. i went to put in park and when i got to reverse it was like i hit a wall and would not go in to park. i drove around the block and heard the noise from the shifter a few more times but now it when in to park. it has done this on a few occasions please any suggestions

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1 answer
have you had tranny serviced? get a diagnostic run.