Differential low on fluid n noise, damaged?

Fill it up to the hole

 

Are you sure it's a rear end? Noises and vibrations travel the driveline. 1 qt is not even low.

Are your airbags up?

If the noise is in the rear end, nothing but repair will help.

Double check those air bags

 

Blown air bag, tree branch in drive line, yes I've seen things lol, hope it's nothing serious, but it's always something in trucking, I miss it so much

 

200f is not at all bad. Even a head wind will apply more power to the drive system.
1 quart low is not at all bad.
But tire pressure should be checked. And now days, with the infrastructure falling apart, the asphalt type in repaired sections will cause all sorts of noise differences.
If you're still sitting and waiting, back up a few feet with the window down and listen. Did it make a clank when you put it in reverse? While moving backward, did you feel anything in the ####pit like a loping clunk in the floor board etc.?
You may have 1 or more dry sockets in a u-joint, or.....worse. Get a good look at the drive shaft between the rear ends and if possible, with the engine off and brake set, reach in and try to push the drive shaft around and see if it moves sideways or has any sort of slack in it.

 

Once more, with feeling.....

You have checked your air bags. Right?