That's the fuel fill limiter/vent valve. It allows a tank to vent to the carbon canister until a certain point the valve shuts. It's definitely an issue on these and some GM products for some reason.
Not sure with chrysler products but a lot of vehicles need to have a battery relearn when you change them. As the battery ages the pcm adjusts how much voltage the alternator puts out. Quite common on BMW and other euro brands.
I drive a lot of trucks at work. I'm thoroughly impressed with the balance of ride comfort and handling with the 4th gens compared to GM. Fords are stiffer but you pay for it with **** ride quality.
I would say it's an internal issue in the engine. Putting it in drive increases thrust pressures on bearings hence quiet in park but noisy in drive. Could be a bad rod bearing or even a noisy piston/wrist pin.
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