hi, bone stock auto g35, stock brakes, rotors, stock suspension, no mods.

it's a daily-driver, used to commute to work, after maybe 35-45 minutes of driving, the car will vibrate noticeably.

any clues? worn out bushings, control arms?

but why after 35-45 minutes of driving? it's fine before that.

 

Does it do it at all speeds? The first thing that comes to mind for me is that it could be something to do with your tires(balancing problem, tire out-of-round, etc), and it only comes out when the tire pressure goes up in the tires as a result of them heating up. You can test this theory by putting extra pressure in all your tires and going out for a quick drive while the rest of the vehicle is cold (meaning that it would not have made the vibration in this situation if everything else was left as it was... ie no pressure bump).

Also... if you could specify the specific situations in which it does the vibration, that might help people troubleshoot your problem. Does it do it at specific speeds.... and if so, is the speed of the vibe faster in relation to vehicle speed? Does it do it only under cruising situations, or also in acceleration/braking situations?

Can you feel the vibe through the steering wheel or perhaps through your automatic shift lever?

 

hi partyman, thanks for replying.
yes, it does it at all speeds after 35-45 minutes of diving+
no, sir, it's pretty similar at all speeds.

cruising situations, and accleration and braking situations.

it's fine before that, really weird.

 

Try that tire pressure thing that I recommended earlier.... it should be very easy to do and will prove/disprove the theory of one of the more obvious potential causes of the problem(that being a tire problem). An accurate test would be if you bump the pressure up from the presumably stock 35 PSI(is that what you're using now?) to 40 or 42 PSI and go for a drive while the car is cold to see if it does the same thing.

 

I have the same issue as OP but it happens rarely happens like 2-3 times a month. I notice it only happens under steady acceleration. It feels like the whole car is shaking, I mostly notice it in the shift lever vibrating a lot. I let off the gas and it stops. It doesn't happen after a certain amount of time driving like OP tho