grindin at my rear axle WHAT DO I DOO!!!!!

[rgnissan240sx]

i started having problems with my rear and i dont quite know what it is, when i put it in reverse it makes this weird grinding noise at my rear axle at first i thought it was my brakes but they are still good andy suggestions ?????

[1unar3clipse]

fluid in the diff?

Mine made the grinding noise when the diff to half shaft bolts came undone, I drained the diff for the bi monthly service and didn't notice.Bam like a week later one of my halfshafts went completely loose, it spun around the e-brake line locking up my rear brakes and causing me to slide out on an on-ramp.

make sure you inspect carefully, get a FSM if you need one.Or use the search button on top, I'm pretty sure there is at least 3 other people that have had this problem.

[rgnissan240sx]

thanks for the advice