“Wub wub wub” sound/feeling

Ok so I’m investigating this further today, and starting to wonder if it’s a front diff needle bearing issue after all. Here are two videos showing the play that exists where the CV axle meets the front diff on the driver side. Is this normal? Also seems like a little bit of a grinding noise but I can’t pinpoint if its coming from the diff or wheel bearing.
https://youtube.com/shorts/59iFkDFw6_A?si=Xa_NvHIbPV1gAjRT
https://youtube.com/shorts/lstRUN9DMKg?si=AwxlC-vPz1bPkSaU

 

Any ideas? ^

 

did you do the wheel bearing test?

put the wheel back on, only lift that side of the truck, grab the wheel at 12/6 (like on a clock) and push/pull. If you have play, its probably the wheel bearing, but could also be ball joints.

There will be some play in the CV. The test for the needle bearing is if you put in 4H does the noise/vibration go away around 45mph?

 

Tested for play in the wheel bearing and it was still tight, LCAs/BJs were done about 2000 miles ago. I’m just wondering if that up and down play where the CV axle goes into the front diff. I’ve never really inspected that area before and it seems loose but maybe it’s normal? Truck is not lifted either so that’s why I’m hoping it not the needle bearing, and it still does the wub wub feeling in 4x4.

 

OP, did you ever figure out what the sound was? I have a very similar sound going on.

 

I never did. I changed both front wheel bearings, all u joints and carrier bearing, had tires rotated and balanced, with no improvement. I gave up and at this point am betting it’s one of my tires like some others suggested.