NP242 front output bearing replace in jeep?

That kind of points to the bearing

The front output is only under load by the chain when one of the 4WD modes is selected. In 2WD the front output is disengaged from the mainshaft, still connected to the chain and spinning from the driveshaft, but not under load.

Sure does sound like it. I wonder how long it would take to change it in the car.
 
In case anyone was wondering, changing both of the front output shaft bearings in the transfer case solved the vibration noise issue.
 
The transfer case usually has one 10 or 13mm 12 point bolt up top in center. If you are changing it because you feel some play in the bearing, keep in mind replacement may turn out the same way. I have two Jeeps and in both the front output shaft has a bit of play at the bearing. When I installed a SYE in one of them I changed that bearing and found that the play is from how the bearing sits in the housing, not because the bearing had any play. It did have some roughness.

I've noticed that there is still play in the bearing that is pressed into the blind hole in the rear case half. It feels like the front bearing is solid though. Is that the bearing you are talking about?
 
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