sigh.. next saturday 18th is my 3rd time track day.

But here is problem! My car has Eibach pro kit spring and lower control arm from alta installed about 7month ago. first few month was ok I don't know since when but I hear thunk noise from rear when I get in to high speed turn no matter left or right it makes noise. For example, when I entering highway ramp curve on 50mph the noise kicks in. I already went shop yesterday they didn't find anything worng they even took out the shock out and retighten the strut and put it back but situation was same.. any advice? I want to go to track really safe without this noise from rear it make me feel little scare too and driving me crazy!@! ah~!~!~!~!~!

 

Do you have an after market rear sway?

 

I had that problem with my coilovers. I ended up taking mine back off. I had forgot to toque the top nut on the struts to 22 ft lbs. They were on tight but not torqued. It solved my problem. Did they torque yours?

 

I had the same clunking noise and I had to do this exact same thing....fixed the issue!

 

the sway may be loose and causing that sound...maybe over time it loosened...

 

Nope Mine is stock never touched when shop installed my lower spring and control arm

 

from the shop I saw they tighten the top nut but I don't think they tighten with torque. I am really glad if torque the strut nut solve this problem.

 

wow... glad to hear that.

 

I shake the rear suspension arm hard up and down when my car on the jack without shock. I didn't hear anything from it. but when they installed shock back to position. I shake it up and down hard as I can then it make little click noise from top of the shock.. they said most likely hear from bushing from shock locate on top. they said they tighten the shock hard as they could. Thing is I don't think they torque the top nut..

 

dont stress bro! you'll figure it out!