The other night i noticed when i step on the gas from 65+ mph the car would make a rotational noise from the rear (low humming sounds) but i will jack up the car tomorrow and take a look.. i can only feel it under load at freeway speeds, driving in the streets i do not notice a difference any ideas?

 

Define rotational noise? Also, how many miles on the s2?

Does it sound like THIS?

There are other S2000 noise videos in youtube you might want to check and compare but we definately need more info from ya.

 

well i can only hear it when i give it accel.. its a low pitch humming rotation sound, and the faster i go 70+ it gets louder, and the rotation seems to get faster..

 

maybe it's the bearing, when the car is up. See if your wheels wobbles or has any play in them. Good luck

 

How bad did you hit the brakes? You might have put a flat spot on the tires I did that once when I locked them up on the freeway to avoid an accident.

 

Check your lug bolts. If they are fine you might ask the shop to rebalance your wheels. It's possible you threw a weight.

 

Wouldn't a bearing be consistant? I feel it on accel 50+ mph

 

at this point it may be the wheel bearing or worst case the diff.. but i didn't launch my car, clutch drop...

 

Diff tends to go out randomly at times. They're not as strong as they're suppose to be. I read that on some other threads. Why don't you try changing the diff fuilds and see if anything broke in there.

 

im planning on changing the fluid this weekend, i dont hear any clunks or any harsh sounds... its just a low tone hum