Engine/Trans reliability question 4L V6 & 6 sp auto

I know in the past there have been some reliability questions with the transmissions in the Caravans. For the 2008 models, they are offering a 4 liter V6 mated with a 6 speed auto trans as an option.
Is this a tried and true combo from a different model? How have they worked out? Thanks in advance.
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Sounds brand spankin' new to me... But then again, I've not looked closely at options for recent years. The biggest engine I knew about for the Caravan's is the 3.8.
Wesley

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