Yes of course....give me more credit than that.....Now I havn't drain it to see if there is metal particles in it but I made sure the level was up. Regardless it is going back Sat to the dealer I purchased it from. They have a implied warranty on it so I'll let them get foot the bill.. But it still gonna cost me about $350 just to let them have it for a week.. rent a car, fuel, etc... and not mention 6 hrs of windshield time to deliver and 6 hrs to pick up...

 

Just as an aside-IIRC don't drive these trucks around without the front driveshaft attached. I thought transfer case lubrication depended on the front driveshaft spinning the pump at the front output bearing. Am I wrong? I might be wouldn't be the first time just ask my wife! Seriously though-it sounds like a U joint. Did you check the front axle U joints at the steering knuckles?

 

The sound has went away now that the front driveshaft has been removed. The owner of the dealer mentioned a index ring for the transfercase. But I still think it is the bearing in the transfercase for the front output.

 

Also looking at the exploded view of the NP273 the lubrication pump is driven by the rear output shaft....???????????????????

 

Update: Got truck back from dealer. Mechanic said all they did was take front driveline to driveline repair shop and had it checked for faulty u-joints (all were good) and had it rebalanced. Whalla!! no sound but there is a barely feel of vibration now. I can live with it.....