Squeaking "bushing" sound from rear

I always use a mechanics stethoscope and place on suspected source of noise while someone bounces it. Really helps to pinpoint the noise.

At our shop we use chassis ears for noises, higher tech version , you can hook up multiple clip on leads to an amplified box with earphones on your vehicle and drive it if needed , overkill in your case , but work really good.

[ame="https://www.youtube.com/watch?v=OvyewnKw3Ro"]FixEuro.com - Chassis Ears Demonstration on 2007 BMW X3 - YouTube[/ame]