I had purchased a used 04 350z about a month ago, and the seller told me the front left wheel was bent. I took it to nissan and they said that both left wheels are bent, rear shocks are bent, and the alignment is off, they even found some cardboard underneath the car. They said the Z may have hit a pothole, curb, or some kind of object that may cause the car to jump. The dealer took it for a spin and said the car is the roughest ride he been on. I had driven it for a month, but I dont know how it feels in a new 350Z and this is my first sports car. So I had installed the Tokico Gas Shocks with Tein S. Tech Springs and 17 Motegi wheels on stock potenza tires. The ride has improved little if any over stock. I adjusted the tokico shocks to soft on the fronts, but I do not know how to adjust the rear. The ride feels bumpy, more on the rear side, and when it drives on rough roads, it feels like an earhquake. I am really concerned about the condition of my car, and just need some answers. Thanks
Sorry so many questions:

How do I adjust the rear tokico shocks/struts of the Z?

Does the tein s. tech springs cause a more rough ride over stock?

Do I need new camber and toe or is it the tires?

Does sway bars make the car more soft or much more firm?

Is it normal for the Z to creak in the interior, everyday there is a new noise coming inside the car. The trunk, the dashboard, the steering wheel, the guages, the rear strut tower, they all creak. Nissan had sprayed some silicone, but that did not help at all.
Does the interior of your Z creak?

Any suggestion or comments would be greatly appretiated.
Thanks again

 

the interior of my Z always had minor rattles and creakes, the car is stiff and can jar and loosen the interior pretty bad