Took my Z on the expressway for the first time in quite a while. I noticed that once it gets up to about 90-100, i get some harsh vibration from the car. It is accompanied by a nice loud humming/buzzing sound. Both of these symptoms get worse as the speed increases. What the hell is causing this?

 

Alighnment? Bad wheel bearing?

 

Well a vibration can travel from anywhere on a car. U-joint, harmonic balancer, tires and so on.

 

Start with the simplest and cheapest, get your tires balanced and rotated. That doesnt work take a look at your bearings and so on and so on. Let us know.

 

Picking up a new wheel from the shop later this week, so ill have it done then. Thanks for the info guys.

 

Slightly out of ballance wheel will do that. won't notice it around town but over 70, yeah...

 

Have you all forgotten about "Vibeshaft"????

 

i can't believe it took someone that many posts to mention the infamous driveshaft vibration. i have it, i hate it, and i bet thats what ur problem is.

 

checked it again today and it seems that at around 70 if i go WOT it will happen, and when i let off it will stop until i get to higher speeds...sounds more serious than an out of balance wheel...