Metal studs in 2001 1500 suburban rear differential

[El Mendigo Chacal]

Hello, sorry if I posted this in the wrong forum, the patient is a 2001, 1500 rear wheel drive suburban,  one day i was taking off when the truck just stop, like someone slammed the brakes and a very loud like crunching metal cans and whole truck vibrating, so well i now removed the differential cover the oil came out like with metal powder mix in it no real metal shavings i believe thats normal, all the gears are ok/not broken missing or rounded, i turn the wheels everything works ok, but in the bottom i see a bunch of metal studs, I've uploaded pictures so y'all can see what i mean. can any one shine some light to see where could metal studs about the size/tall of a dime could have come from what are they??? 

[riverbanks]

Those are bearings,sorry,it's toast

[El Mendigo Chacal]

Hello, thanks for the info, so i kept on looking for what u said and they came from one of the two things, i uploaded fotos tell me if im wrong.

[riverbanks]

You got it,now the problem is,every part in the rear end is comprimized, a total cleaning and total rebuild is needed,a used replacement would be my choice