Hi all,

First of all, nice to meet you! My name is Yusuf and I live in the Netherlands and have recently purchased a 350z.

After a few months of driving and having sloppy suspension feel of the car, I have decided to change the LCA, ball joints, compression arms and outer tie rod.

Last month I changed the LCA (billet ones with PU rubbers) and compression arms and everything was fine.

A few days ago I replaced the ball joints on the hub and outer tie rods. (Both sides)
After I have done this, I noticed I could not snug up the compression arm fully, as it would drop down a bit more and then free spin.

When everything was put together to get an alignment, I noticed that there was a clunk when applying the brakes.
To check, I had someone else roll the car and brake so that I could watch and see if anything happened.
I now notice that the wheels (both sides) judder when braking, like it is going front to back.
To make sure I swappes back the old compression rod on one side but the same issue still persists. Can't really snug it up either.

I am sorry if this has been answered before but I have no idea how to search for this so I am trying it this way.
I can try to upload a video if needed.

Thank you and I appreciate all the help.

 

to tighten ball joints fully, they tend to require you use an impact driver and have some weight on the joint, aka, place a jack under the lower arm beneath the ball joint.. my guess is that it is not seated fully, or the cone is not correct for the new lower arm, common w the chinese cnc products, i had that issue of cone not matching or fitting on ebay cnc lower arm many years back. ( also not sure if this is the issue as you mkentioned the compression arm, perhaps that arm ball joint is bad now )
you cant test all of this by hand if you remove the front shock mounitng bolt and move the entire suspension around by hand.