To know for certain which transmission is in *your* specific 3.0L Dodge Grand Caravan, you need to check:
* Your vehicle's paperwork: The owner's manual or the sticker on the driver's side doorjamb will specify the transmission type.
* The VIN number: A dealer or online VIN decoder can provide detailed specifications about your vehicle, including the transmission.
* Under the hood: While not always easily visible, the transmission case itself might have markings indicating the type.
Without knowing the exact year of your Grand Caravan, it's impossible to say definitively which transmission it has.