This vehicle should be covered under warranty. We don't know if the detent failed to do its job. Take to a local dealer and tell them this vehicle lost reverse. Let them deny a claim and you can call the Chrysler Field Rep. in if needed. You can also get the Attorney Generals Office involved if need be. It's not how it happened it's broke, fix it! This is why we pay so much up front money, so we can sleep at night and have a good warranty.
Good Luck!
Dan
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