I'd replace the other rear wheel bearing first.
Have someone drive the car while you ride in the back seat.
You can tell alot from back there.
174,000+ miles, 5/20/12 new ej257 short block, 8/20/11 installed VF52 turbo, @20.8psi, 280whp, 300ftlbs. Also CHECK YOUR OIL, these cars use it.