What Engine/Trans/4WD system does it have? QTI/QTII/QDII?
The QDII has LSD's and I have seen posts about over due fluid changes causing some binding in the LSD's.
Other possibilities are Differential, Front Differential Mounts, Front driveshaft, and Transfer Case.
Need to inspect all those items.
I have had a slight clunk every once in a while when the preload changes on the drivetrain, usually low speeds, going from coasting to power onto the vehicle. I suspect I may have a little stretch in the chain in the XFR case. All my items check good, but there is some lash in the output of both front/rear of the xfr case. And lash (free play) is what creates clunks when load comes off and goes on the drivetrain.
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