Loud Clunk from driveline

[Merlins Jeep]

I am very intrigued - I also have a 2025 JLU. At around 700 miles I was working to get the transfer case into Neutral so we could flat tow it (We had done this same thing several times before). Transmission was in N, and I went from 2H to N - seemed to go OK. However while the transfer case shifter on dash indicated we were in "N", it was actually still engaged (4H from what I could tell). I figured it was just a fluke where something wasn't pushed all the way, so I shifted down into 4L which resulted in a pretty loud engaging clunk which made me go "oof"... I was then able to go back into N and everything seemed OK, but I have been hyper sensitive to it since making sure all is OK since this is our first Jeep. Other than this, we really haven't "used" 4H or 4L.

Since then, I have noticed a couple things - And maybe they are completely unrelated, but I found it odd how similar it was to what you were seeing :

1) When first starting, and shifting into R (2H) it seems to make a brief clunk that I never noticed before (but again, I'm not really sure what normal is).

2) I also noticed a type of "whistling harmonic" that occurs randomly at low speeds (like 10mph) and at the end of a turn while straightening out (only ever happens during a turn when it does). It only lasts about a second and I cant reliably recreate it on demand. The sound is less of a whistle, and sounds more like the sound you would get out of a Reed instrument or one note harmonica, or wind coming through an old window. My first thought was something like a vacuum line leak, but I haven't had a chance to troubleshoot it - and when I saw your post I wondered if it might be similar.

I thought it was curious - interested to see if anyone else has some good input - following!

Very interesting and a lot of similarities. I think we should start by following Beach Nuts advice and check in with the dealer. I absolutely want this on the record and have it looked at so there are no warranty issues if things break.

Everyone that has contributed have been very insightful and is very helpful - like you I have under 1000 miles in Jeeps total.

As for the steering sound, I can recreate it by just turning the wheel and when I stop turning, it keeps sounding for a second or two. I guess you could call it a whistle in my case as well. Did not detect it before the Clunk episode. I also understand the steering is electric so that may have something to do with it...

Please post up if you get any more info and I will do the same... as for the Jeep Community, this has been great and can't thank all of you enough. .

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