Does anyone have any idea what this sound could be? Started some months ago. It used to only do it when I crunk it up and then go away so I thought maybe a belt. But now it’s doing it constantly. And now transmission won’t go into gear. Reverse or drive. When I restart vehicle, it will go into gear but a few minutes later it’ll start doing the same thing. Same thing while driving if on road. Any ideas? I didn’t want to assume I need a new transmission but I’m hoping I don’t. The gear situation is a new symptom. I checked fluid day before these symptoms started and notice it needed to be topped off. When transmission was warm it was reading on the cold side of dip stick so I ordered a quart for Amazon to deliver. Drove truck again and the transmission started acting up. Added transmission fluid to hope that would fix the issue but it did not but now it is reading in the hot hash marks so I didn’t overfill or anything. I have a wireless BlueDriver scan tool, no transmission code. Only code that exist is oil sensor code because oil sensor went out a couple of years ago and sometimes an ABS code. Idk if I’m posting this in correct forum any guidance will be a big thanks