Just had a set of Eibach Pro-Series springs installed on my GE8. Really love the setup, but I noticed that it has developed a vibration/shudder in the front, since the install. The vibration only occurs from 50-60mph under moderate/hard acceleration. When I let off the the gas, it eases up, after 60mph it disappears completely. Steering feel/direction is normal. Any ideas of what could be causing this? I did have a alignment done after the install as well. Any help/suggestions would be appreciated!

 

check the wheels, might need balancing.

 

Maybe the balancing... Or could be steering bushings. I'm having the same problem on my mr2 right now. 50-60 it shakes but anything after that or lower it goes back to normal. And my problem was worn bushings.

 

steering bushing on a brand new car? unlikely. return it to the shop who did the work.

 

exactly, something got not installed correctly, something not tightened, something got bent.......