I have been expiriencing some readlly bad vibration and shaking on my 03 evo. i have 40k miles on it. when i drive over 45-50mph, the steering wheels starts shaking and vibration crazy. i start like drifting off to the side of the road, im not sure why this is happening? i dont know, cud it be i need my wheels/tires balanced? do i have a bent wheel? im not sure what is causing this terrible shaking/vibration. it is very uncomfortable driving my car. the steering wheels doesnt shake or vibrate much when im going under 40, but i didnt buy an evo to go that slow please help me out!!!

thanks

 

Warped rotors maybe

 

Check the following:
1. Make sure all the lugs on every wheels is torqued properly
2. Make sure all the tires are properly inflated (~35psi)
3. Have your rims and tires rebalanced.
4. Check of any bent rims ...

"Warped" rotors will ony cause vibration under braking. Even then just rebedding the pads with the rotors usually takes care of that issue. Anyone of the above should fix your issue unless you have damaged your suspension in some way.

 

could it be anything else? i was thinking it could be my suspension

 

May be how your strut bar was torqued down.

 

how can this be fixed?

 

alignment, tire balance, torque lugnuts..

 

If you're vibrating at a certain speed and not all the time, chances are, your tires pressures are uneven. I'd check those first since it's quick and free. Then check wheel balance like daworstplaya said. Finally, a good rotation will go a long way!

HTH

 

Inspect whether or not a rim weight came off.

 

^^+1 unbalance caused by wheel weight falling off or snow and ice on ID of rim.

 

jack it up and shake the tire, or.... take it to someone who can fix it..

 

Its gotta be allignment if your steering wheel is shaking

 

ya my steering wheel just shakes and its uncontrollable!!! so what do i do about the allignment?

 

I would take into your local mitsu to get realigned.. did you hit any potholes or was the car in an accident?

As others said earlier, an easy check would be to see if you lost a rim weight (usually located on inside of "rim well")

 

just take it to any local tire dealer to get a alignment