WJCO
Meme King
Not the gears. That I can see. It’s either the ARB has a failure or its remnants from the casting that are affecting the ARB. I swapped the fluids, brought some metal into my shop and they really were scratching their heads. Basically said run it till the problem is readily repeatable.
If it's inside the locker, there should be a 5 year warranty on it. I've had great customer service with arb. It might be worth mentioning it to them now so they have something on file. They may even be able to recognize those metal flakes as something they've seen before.