yup unfortunately, my turbo's got creaky rear suspension, its had a new rear trailing arm fitted on drivers rear, and i'm pretty sure its the bolt that holds the trailing arm up that u fit the rear spring in which is squeeking or creaking cos it looks like theres a bush is there. if i take the rear wheel off and jack the trailing arm up with another jack u can hear the creaky squeeky sound.
Also if i drive around people look at yah cos everyone can hear this creaking sound, especially on speedbumps.

the car has 205/50/15 tyres fitted on the rear and i think these are touching the shock.

any ideas here or had similar problems?

 

on the rear arms, there is something what connects to them, cant think whats its called,think its something to do with the brakes, there are moving parts on these which can get dry.

get a mate underneath while u move the arms to see where the creaking is

other than that, could be the bushes