2G Vibration while cruising and braking at high speed

[A Sharp]

Hey,

I have a '95 Talon Tsi (FWD) with Tokico gas shocks and Eibach lowering springs. The problem is that the car has a slight vibration while traveling above 40 mph, that worsens when the brakes are applied. I do not feel it in the steering wheel, but rather in the seat and in the brake pedal, which makes me think that it is coming from the rear. Also it sounds as if it is coming from the rear right tire, though it's hard to tell because the noise is fairly quiet.

I knew that my right rear wheel bearing was going out because it was grinding like hell around corners, so I replaced that hub. Unfortunately, the vibration is still there. I also replaced the rear rotors and pads because the old rotors had some pretty deep grooves, which made me think that they were at the end of their life and were causing the problem. Still no luck.

When I jack the car up and test the wheels for play, they are all rock solid and all the joints look like they are in pretty good shape.

The only thing that I can think of at this point is a possible tire imbalance. I got all new tires from Walmart about 7k miles ago. However, the guy who was doing the work said that he wouldn't balance the right rear tire because somebody had glued the the little center cap with the eagle logo in place. He didn't want to damage the cap by knocking it out, so he couldn't put it on the balancing machine.

Could a tire imbalance possibly cause a vibration that worsens when braking? Again, I don't really notice the vibration when I'm driving or braking below about 40 mph.

This problem is really bothering me, especially since I've already thrown a couple hundred bucks at it to no avail.

Thanks!

 

[Dsmkauai]

Yes get the tire balanced bro. Knock the center cap out yourself.

 

[farmer890]

Shaking when driving (whole car) = tire imbalance
Shaking when braking(brake pedal, steering wheel) = brake rotor
Shaking when parked (whole car) = subs are pounding

 

[A Sharp]

Thanks for the info guys. Well I just got back from Walmart after getting all tires balanced and rotated. The car no longer vibrates while cruising but I can still feel it in the brake pedal. It's not like the pedal shakes really hard, but it is definitely noticeable. I still feel nothing in the steering wheel. This would point to the rear rotors, but I just replaced them!

Could the front rotors be slightly out of spec so that I feel vibration in the pedal, but not the steering wheel?

 

[GRAVEDIGGER]

Knock out the cap and balance that damn thing already.

 

[GRAVEDIGGER]

Sounds like the front rotors are warped. I would have them turned or replaced if need be.

 

[A Sharp]

Sounds like the front rotors are warped. I would have them turned or replaced if need be.

I'll give that a shot. I just hope there's enough metal left on the powerslots that I have up front to get 'em turned. I'll be sad if I end up having to toss them out .

Thanks.

 

[Mello]

If you haven't checked yet, make sure the the hub surface where the rotors mate is cleaned up really good & you remove all the rust, dirt & grime. If these are dirty it can cause the rotors to not sit true and cause minor irregularities in the pedal as well.

 

[PlanZero]

It's very common to receive slightly warped rotors right out of the box. I've had terrible luck with advance and autozone rotors.

 

[Archer Fabrications]

Yep i got a set of warped rotors for my truck shook violently when breajing and stopped when i out old rotors back on. Ive got the shaning at 65mph too and tire balance was mh next idea as well as alignment. Maybe think about that?