So, the other day I jacked my car up to replace my drive belts. Later that day I noticed a dull bed spring sound when entering a parking lot. It has not drastically gotten worse thank god. I notice the sound when going over speed bumps and sometimes while turning.

I have done some research and it sounds like its either my lower control arm inner bushing(transverse link), lower ball joint, or compression rod~chassis nut/bushing. I looked under my car today and the transverse link looks ok.
The compression rod~chassis nut/bushing is not a mirror image on both sides. Although I am parked on the slightest of slants. What would be your guys guess?

 

Does your car sit lower after doing your last project?

 

No sir, it does not

 

I just check did the 6-12 3-9 check and there was no give at all. Then I drove it and didn't notice any sound at all.
I love my Z...Any idea what might of happened when I set it down the first time which caused that noise?

 

GREAT!...its back, but I can only notice going super slow over dips and when I turn my wheels while parked.

 

Is it possible the lower ball joints need to be replaced/greased even though both wheels passed the 12-6/3-9 check...what else could be make that type of noise?
I've read that the lower ball joints will make a knocking sound when they're bad. This is more of a dull bed spring sound.

 

What project is this you speak of?

 

I just replaced the belts, thats it.

 

I also don't notice it right away, its after I drive it for a bit. Like I let it sit for a day and drove it around with the radio off of course and didn't notice it at all for the first drive of the day, but later that day I did.

Both front fenders are sitting at the same exact ride height. I have a feeling its the lower ball joints. What kind of sound would a worn lower control arm inner bushing make? The bushings are centered.