So ive done some searching and done everything that I could find... I greased all the rear bushings, spring perches, arms, sways etc.

I can't pinpoint the noise since my car is pretty slammed but it sounds like its comin from the center of the rear. above the diffrential? I don't know what there is that can squeak up there but it sounds like a door creaking. It also only happens while im going about 30mph or less and especially when the car goes over uneven bumps. Also it can mainly be heard from outside and very audible. I cna hardly hear it inside.

my setup is:

03 coupe 5at
JIC FLT-a2
stillen sways
ichiba front and rear camber arms
spc rear toe bolts


its lowered enough to tuck half of my 275/35/19 tires.

any help or advice would be appreciated. ive searched for weeks and tried many things but just cant pinpoint the problem.

 

I had a lot of suspension "noise" after installing upgrading "rear" everything (Coilovers/Springs/Sway Bar/Endlinks/Bucket). I then installed "our" Rear Strut Bar and all of the "noises" went away! I have since removed the Bar and the "noise" has returned!!
I need to get a Bar back in as soon as possible! lol ...thanks Zack!

 

so you think it is just purely due to chassis flex?

Also you said you had a little bit of noise only? Mine is pretty substantial.

 

My rear suspension "noise" isn't "substantial", maybe compared to yours, but it is pretty annoying! I do believe that chassis flex is one problem.
Did you check to see if any of your suspension is "loose"?
Maybe you should jack the car completely off of the ground and do a thorough inspection or have someone
in the "big" back seat and try and isolate the location.

 

The sound is loud but it can only be heard outside. I tried jacking the car up and down but it is coming from the center top area. I cant see that far up to find exactly where it is though. I will try again. Hopefully i can find it. It is very irritating and makes the car sound cheap and broken.

 

It's a miracle! I got the squeaking to stop somehow. I don't know the exact cause and solution but heres what i did tonight to fix it:


add 1 degree of negative camber and toe , wd40 rear upper control arm bushings and change my stillen sway setting from hardest to softest setting. I am guessing it has to do with the sway setting.

 

Nice
....did you tighten your Endlinks while the car was on the ground (under load)??

 

Well i dont have adjustable endlinks so i just bolted them on while i had the car up. There is one more problem. When i hit a big bump my tire hits the tab on the rear fender that holds the bumper on. Maybe i need to stretch tire?

 

false alarm =/ I still have not fully fixed the problem. the things I did made the problem more acute, so when i drive regularly there arent sounds, however over bumps there still is squeaking. I am assuming there is some problem related tot he sways? do I need adjustable endlinks or something?

 

found the REAL problem today and totally eliminated it. crappy ichiba rear camber arms were squeaking. I lube the joints and they work fine now. no noise at all anymore.