https://www.s2ki.com/s2000/topic/779...-acceleration/

read this post first... im getting the same thing but its only between 35mph-55mph in 3rd and 4th gear while getting up to speed and if i push the car between this pseed and in this gears the vibration is horrible... i can be in second gear and get up to 35mph+m and no vibration... now this is what i just had done to the car right b4 the vivration started, new diff with 4.77 gears and reinforced housing, half shaft spacers, coilover, new wheels with high offset in rear +22, -4.1 degrees of camber, just got an allingment, wheels balanced, and hub centering rings.... i really dont know what could be cousing this being that i havent pushed my car hard at all

 

help???

 

Pitted CV axles. As far as I can tell, the problem has been already diagnosed in that other thread. Swap the bucks or use axle spacers.

 

i do have axel spacer bc i had the clicking noice and it went away and now this has started out of nowhere, bc i have read the threads where they say either flip the buckets or get spacers...so WTF

 

This is posted in the wrong section, youd get more response in the under the hood or suspension section. The fact that its only under acceleration would make me thinks its pitted axles and to either flip the buckets or pick up some new axles. But the fact that its only at a certain speed makes me wonder, my girlfriend had a bad set of tires that vibrated betwen 25-30 under vibration, tried many different things but it didnt go away until we tried a different set of tires.

 

i second the pitted cv joint theory. swap em and you're good.