Rattling/Squeal when Moving

I’m having this rattle when I’m moving, I’ve only comfirmed it coming from the driver side. I haven’t checked passenger side and it sounds to be coming either from the engine or the wheel.

I tried driving in reverse at 5mph but I didn’t hear it. I only hear it when I’m moving forward, I can be coasting or accelerating. I don’t even hear it when I’m braking?

it sounds like a pulley, but I’m not sure. it does NOT do it when I’m idling which makes it hard to diagnose (I’ve tried accelerating while idle). I’m thinking it has to do with the wheel assembly somewhere since I don’t hear it when idling.

anyone have ANY idea what it could be? I might be selling my truck in 2 months so I’m trying to work out all the kinks.

(truck has almost 200k miles btw, if that’s helpful)

 

Wow. That is a frustrating problem. I honestly don't know. Do you have video or sound clips?