Drivetrain rumbling left turns only

[Andy82GT]

Originally low pitched rumble sound seemed to come from right rear, during left turns only. Replaced right rear bearings (looked bad) and CV axle, and seemed to have fixed for a while. Rumbling is back, but seems to come from rear center now, and can feel vibration in the e-brake handle.
No noise or vibration driving straight or turning right, even hard rights. A4LD with stock DS, new guibo, stock diff, rear discs. Good rear tire clearance. Any ideas?

[Ed Lijewski]

Rust on caliper outside of where brake pad had rested while parked causing brake pads to rumble over rusty sections?

YMMV

[thesameguy]

Possibly a damaged tire?

[Andy82GT]

Thanks for the good suggestions... Tires look good (Conti Extreme Contact with low miles). Brakes look good. Maybe an alignment issue???

[Ed Lijewski]

Cracked guibo.

YMMV