Front end noise

[Rlaf75]

I have a 21 5th gen 5.7 non-etorque 4x4 with 3.21 gears with only 35k miles on it. I noticed today that I have a faint bearing noise coming from the front of the truck. I dont believe its a gear whine. It can be heard in the cab starting around 20ish mph and gets more pronounced between 40 and 50. Its definitely not a tire whine and it doesn't appear to change pitch or sound when I turn the wheel to change lanes like a wheel bearing would do. Its a steady noise. I haven't had a chance to get underneath it to check things out because its been drizzling all day but I'm thinking it may be a front different bearing. Either the pinion bearing or an axle bearing. Is there or has there been any issues with the front differentials on these trucks? I'm also aware that the front diffs are not serviceable from a gear standpoint but are the bearings replaceable or are these things basically disposable? Hopefully I'll get a chance this week to take a look around under it.

 

[adw09Ram]

did you figure this issue out? my truck whines on cold start.

 

[adw09Ram]

AI responds that its a serpentine pulley the idler maybe?

 

[Daw14]

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[Rlaf75]

did you figure this issue out? my truck whines on cold start.

I dont come on here much so I actually forgot about this thread. So, a very long story short. The dealer replaced the front differential under the remainder of the factory power train warranty. That did not entire solve the problem though. I got the truck and ended up replacing the right front wheel bearing. That as well did not solve the entire problem. I then replaced the left front wheel bearing and that completely solved the problem. Moral of my story is, there was actually multiple things causing the noise. The differential made it quieter, the right wheel bearing made it quiter still and the left wheel bearing stopped it completely