If just the needle bearing in one cap got crossed up and self destructed, that may not ID the bad joint as the other three caps will hold the joint steady. But usually when one cap does that, the others have enough wear so that some movement will be visible. But it is hard to put the kind of strain on them with your hand as the engine puts on them when driving.
I did that on my Silverado once and they all appeared to be good. I did it because I could hear a slight clunk when shifting the transmission into gear. Didn’t see anything so I ignored it. A couple of weeks later, the transfer case adapter cracked at the end of the transmission. When I removed the drive shaft, then I discovered that both U-joints in the rear driveshaft were bad.