HI All, Im new and I have searched and read at least 15-20 posts on this topic and haven't seen a solution. Evidently its a fairly common problem.
2005 / 4.7 / 2WD / Grand Cherokee / 90k miles. When downshifting into low I get a clunk. The faster I stop, the louder the bang. If I shift into neutral at 25-30 mph and stop I have no issues. It gets worse when the vehicle gets heat in it. For the 1st few miles its very soft or unnoticeable. But after 5-10 minutes in its very repeatable.
Being 2wd, you probably just have one filter but the possibility exists that you have the cooler return filter as well. The cooler return filter is a spin on just like the engine oil filter. It's inside the pan as well.
After reading the search results I was hoping that was the problem but it's transmission related. Only issue it the downshift into 1st. Haven't had time to drop the pan but I did notice it doesn't happen when it's cold. For the 1st 10 minutes of driving it's smooth as silk. After the transmission get some heat in it it returns. It gets worse the faster I slow down. A slow rolling stop it's hardly noticeable, If I hammer the brakes it bangs pretty good. Sliding it into neutral when coming to a stop eliminates the clunk everytime.
I hope a oil change and filter helps. I also heard about some software flash update ?
I would at least look at the differential bushing that is on top of your front diff. Mine was clunking around and replacing that solved it for good. You can visually inspect and see if it is an issue....just gotta get under there.