Stance GR+ for 370z Bought from THM Making Thump Noise!!!
 

Hey Guys,

So i recently purchased a set of Stance GR+ OEM Type coilovers from THMMotorsports, installed them this weekend, and the driver rear is now making a thumping noise whenever i make a left or right turn, or go over a good size bump on the driver side...

Anyone else have this problem? Any fixes? Does Stance offer a warranty? THM, Do you mind chiming in?

Check to make sure all of your bolts are correctly torqued.

i am 100% positive they are torqued and tight correctly.

give THM a call, they should be able to help out.

haha,i think i have a very good idea why it's thumping!

did you remove the rubber cone shape in the rear spring mount? if so, that is why it's thumping. you are suppose to install the Stance spring mount onto the rubber cone shape in the rear. hope this helps!

The rubber mount is on the bottom of the spring. We made sure to put it on there. Thanks for the suggestion though.

I already sent THM, and Stance an email. Hope to hear back from them soon.

i'm talking about the cone shape on top. both top and bottom of the spring suppose to have the factory rubber on there. just tell me this, did you remove the cone shape rubber that's on top?

or better off, do you have any pic's of your install? i can tell you right now if it's correct or not.

we did not remove the rubber cone at the top.

And it is still there, we put the adjuster thing for the spring right under it. and then the spring and then a rubber piece under the spring.

yes, that is correct. sorry, that's all the tips i have.

i just installed the same exact setup for a local guy yesterday. so far so good with no complaints about any clunking noise whatsoever.

Thanks alot man. I think it might have to do with the preload of the spring? Just read a thread on here and a member is saying his spring wasnt compressed enough so it cause a thumping noise.

How did you set up the spring and the strut? Because when i installed it, i didnt even adjust the height because im not sure how to do it....

that can possibly be it!
i preloaded the rear spring closer to the end about 8 threads left. i unscrewed the shock cap and turned it in about 10 turns.

I thought you had to remove the rubber cone shaped thing when installing the rear with coilovers?

not with these newer style cone shape spring mount. It's designed to install onto the existing factory rubber cone. By doing that should eliminate all the clunking noise but the op's problem has to be something different.

Ok. I'm going to be installing my BC's this weekend. I hope they come in.

NIce!

The BC setup requires you to remove the stock rubber cone