Hello, I have a clunking noise coming from the rear of my 09 GT/CS. I read around and thought it was the sway bar being loose so I torqued that down more and I still have the clunking noise over bumps. My suspension mods include: UPR eibach springs, tociko d-specs, CHE lower control arms, BMR relo brackets and a CHE adj panhard bar. All control arm bolts torqued to 135 ftlbs under load of the car and other bolts torqued to 85 ftpounds I think it was.

I believe it is the suspension bottoming out. Before I cut the bumpstops there was only about a quarter inch between the bumpstop and the chassis. Now there is about an inch but it only make the clunking noise over rough pavement where the springs would compress more than an inch. Around the bump stop there are clean areas showing that it is hitting the bump stop and the rubber is deflecting.

Is it a possibility that 09 models have the bump stops mounted higher up and that is why it is hitting?

Ground to fender is 27.75" on mine, and 28.75" on my friends stock 06.

 

hmm not sure. i have had a problem in the beginning with my 05 with the over axle pipes slapping around go over really rough roads. i would also check your exhaust make sure,theres no contact being made over rough terrain. other than that buddy, sorry im not sure.

 

check some service bulletins from ford to see if theres been a problem like this and if there is a correction

 

hmm ok. Could it be a blown shock? Ive heard theres been a few people that have gotten faulty shocks from Tokico and that there customer service really sucks when trying to replace it with the warranty. I'll swap my stock shocks back on Friday to check.

 

I have a clunking in the rear of my Mustang and discovered today that one of the exhaust hangers broke off the driver's side muffler. Might be something to check.