Did you check the filter screen in the reservoir?

I have 2009 s80 t6. Have 206 k miles on it. The fluid is dark, smells burning. It has humming noise when you start and turns wheels. The real culprit was clogged filter screen.

I installed two no brand TPMS sensors on my two snow tires. I used vida dice to save it on car computer. The warning sign went off couple days, then came back. Then I drove with warning light on. Unfortunately one tire hit nails last month and another last week. Both are damaged after driving flat. ...