Rear end issues

[169mph]

Before I start removing stuff I checked for missing or loose bolts. The only bolt that wasn’t torque to spec was the forward / front hex bolt that attaches the differential to the carrier. The bolt wasn’t backed out so can’t imagine it causing the problem. I found a torque spec of 52 ft/lbs. not sure if that’s correct. When I raised the rear end and spun the wheels I do hear slight rubbing sound at each wheel. I checked the front wheels to compare and got the same sound. I believe it’s normal. Can’t imagine all four wheel bearings failing at the same time. I did notice the rear end bushings look worn to me. I’ll post a picture of hex head bolt and the bushings. Again I appreciate any feedback.

[spdbrake]

The second bushing pic you posted is the rear suspension carrier that bolts to the car's frame which should not cause your problem.

So if all three diff mounting bolts are tight. (Not the 4 suspension carrier bolts)
The aft two bolts I'm more concerned with actually.
Circled in this junkyard pic.



The CV joint extender blocks are tight and not wobbly etc..

Your bushings look fine and you reported 3k miles on the last summer, but what build # is your car.

I'd paint the affected (scraped CV joint extender block) and drive the car a bit.
See if the rub issue returns. You may have pick up some crap flipped up of the road.