Wobbly grinding noise from Rear tires

What is your question?

at approx 30mph vehicle rear wobbles and a whinny grinding on my 2015 Nissan Murano S AWD.

What makes this problem better or worse?

nothing, always there overemphasized very noticeable sound

How long has your 2015 Nissan Murano had this problem?

6 mo, getting louder