Getrag 250g Rattle?

[Marciok]

Hello friends, how are you? I'm from Brazil, first time posting here! :P
Recently i bought a 318ti with the getrag 250g 5 speed, and is making a strange noise (likesomethng clacking in the rear of the box)... is this the infamous Getrag Rattle? What can i do to reduce it? Can i drive it like this or better resolve it? Presumably the input shaft bearing has been replaced, but who knows... Thank you so much!

https://youtube.com/shorts/PM6qMA7IYGU