Chirping noises

I have a 2017 TRD offroad with about 172k miles. The past two days I started hearing a high pitched chirping noise. At first it only did it a couple times and stopped but now it seems to do it often at about 25-40 mph. I looked under the truck and whatever this part is with “WA” on it feels like it has some grease or something all over it. This is near my front driveshaft too which looks like something dropped onto it too at the joint. I’m wondering if anyone knows what this may be or how I could rule anything out. This is a video I took of the sound. https://youtube.com/shorts/OuyEHgTaRNE?feature=share

 

Serpentine belt maybe? Have you greased your drive shaft ever?

 

I replaced the belt about 25k miles ago. I have greased the front driveshaft but I don’t have zerks anywhere else. It feels like there’s a bit of vibration too.

 

u joint at the rear axle

 

Sounds like a belt again or one of the bearings

 

It's likely the serpentine belt, or the tensioner. You can spray little water on it and see if it goes away.

 

Yeah if he’s changed the belt could be a bearing.

 

It only does it at speed, while accelerating. Not while idling. I guess I could spray it with water and try driving it afterwards.

 

Probably a U joint or at least where I would start. Get back under the truck and twist the driveshafts by hand. They should have a little play, 1/2"-1" of rotation. But if its flopping around, you'll know.

 

I tried to move everything around. Everything looks normal except for the front most joint on the rear wheel drive shaft. Not much play but it looks like one of the seals may be damaged. https://youtube.com/shorts/xPFqoiqf2z4?feature=share