Whenever I place the car into Drive, the car makes a loud thump like a glove hitting a boxing bag. When I come to a stop while in Drive, the engine RPM oscillates as if it's stuck in gear (see link). When I place the car into Neutral, there isn't any oscillation. Now I've just had the transfer case and front differential replaced from a 52,000 mile Grand Cherokee. Occasionally, ill get the "Service 4WD" notice. As a side note, there seems to be a whirring in the front right tire. (https://youtu.be/To_C5S0ZPgg)
My car has 88500 miles.
My car has an automatic transmission.
The clunking could be related to a bad or failing mount for the engine or transfer case. From the video, it is really hard to tell. If it is a very consistent issue I would blame a mount. A qualified technician should inspect the engine and transmission mounts, as well as suspension, for any play. A certified mobile mechanic from YourMechanic can provide this inspection at your home or office.
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