Suspension "clunk"

[Triathlete]

Okay...so today I checked the gear oil level in the diff. It was good. I then added a second tube of LSD additive. I lubed the 3 zerk fittings on the driveshaft with Mobil1 synth grease. I removed the rear right tire and inspected the brakes and rotor. Everything is or appears good.
Went for a test drive. I am getting a clunking sound (almost like something binding) while driving straight. The sound sounds like it is coming from the right rear although it could just be transmiting to that area. The noise dos not happen all the time It will happen 2 or 3 times real quick then not happen again for a while. I am stumped. Anyone have any more Ideas? I've got 2 weeks to figure this out before I head to Moab.

[Triathlete]

Next up will be changing the U joint. Reading the manual and it soinds like this might be the problem (fingers crossed).

[Triathlete]

Searched all local parts stores and the local Zu dealer. No one has them and the Zu dealer said they were no longer available! Zu dealer told me to check the "junk yards". Why would anyone want to buy a used wearable part? Called Merlin. He said the California wherehouse had 2 on hold. Meaning a dealer could not get them for shelf stock but for a customer with vin # it wasn't a problem. With 15% discount part was $75 shipped to the door. Will be here in 2-3 days....just in time for the weekend!
By the way...my local dealership is a joke and the only reason I called them was because no one else carried them locally!
I was also told by one of the local parts stores that his 'puter only listed 2000 and 2001. I told him I thought they were all the same. He said both had different part #'s. Just a bit of a heads up.