Grinding noise rear end?

So I had a grinding noise in my rear axle when I took a corner and my rear end started to fishtail. (Snow up in PA again no plow trucks out at my hours) I had traction control off at that time with Auto LSD lit up but when I tried to recreate it I had traction control on and Auto LSD wasnt lit up and it still grinded. Could that have Been my auto LSD or traction control or what?

 

Disregard figured it out from a friend and other threads

 

What was it?

 

it was the braking system to prevent you from sliding out of control just almost sounds like grinding.

 

I noticed a weird meshing sound yesterday when I was out playing in the snow on some forest roads. I was in 4-hi with nothing disabled. When I began to slide towards a ditch along the road I steered away from the ditch. As I turned the wheel and the truck slid, I heard what sounded like wire brushes or something... it was a strange sound.

 

Yeah it's the brake system/traction control I turned it all off and had some fun in the snow and never heard the sound.