Drum brake keeps grabbing and grinding

If you have not replaced the springs, that could be an issue, but unlikely. Make sure the backing plate is not bent or rusted causing the noise. Also, when adjusting the brakes, make sure to set the shoes. What I do is this, adjust until there is a drag on the wheel, then apply the brakes several and readjust. Keep in mind, rust or dirt is usually the issue.

Here is a video on replacing rear brakes:

https://www.youtube.com/watch?v=3W0fs6shT3o

No. Bleeding the brakes won't change anything unless you have air in the system. First, remove the drum, sand any glaze from the drum (where the shoes make contact). Also, lightly sand the shoes, too. Also, make sure you have the primary and secondary shoes in the correct position. I attached a picture I found online for you to review. Basically, the primary shoe usually has a shorter lining and is forward facing. See pic.

If the shoes are correctly installed, the springs are good, and you sanded as I previously mentioned, and it still makes noise, replace the shoes. I have had issues with certain brands of shoes / pads that sound like I'm running metal to metal until I touch the brakes. I can't list brands due to legal issues. I'm not a representative of any company, but have never had problems with brands such as Bendix, Raybestos.

Let me know what happens. I have a feeling it's the actual brake shoes. It sounds like you did everything correctly.

Have you had any luck?

Can I ask how the axle bearing is doing? I ask because you say the noise stops when you hit the brakes which would indicate an axle bearing issue. Lift the car and check for play up and down with the emergency brake off.

https://www.2carpros.com/articles/jack-up-and-lift-your-car-safely

if there is play this guide can help

https://www.2carpros.com/articles/rear-axle-seal-replacement

Please let us know what you find. We are interested to see what it is.

Cheers, Ken