2007 Escalade ESV- when trying to put into park;resistance felt-left in reverse on 2007 Cadillac Escalade ESV

Was able to put in neutral, turn off engine and lock car. Not able to put in park--only able to get lever to reverse. Put brake on as car rolling when ignition off. Tried again later-no change. No noise or other signs--occurred after sharp left turn into driveway and putting on brake to stop??? Has only happened once.

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