That’s an interesting thought and possibility. He replaced almost everything in the front suspension with the exception of the coilovers and swaybars. Moving up to the Steering is a good next logical step. What could go bad within the steering system and how would one go about checking for it?

 

I'm wondering if it's a shock, not sure the rack would have a harmonic imbalance at a specific speed , it would likely be doing it at all speeds.

 

I imagine it could be doing it at all speed but only noticeable at high speeds.

 

That's kind of the point - if there is something causing a vibration that only is apparent at speed, this is likely some kind of an imbalance, and if everything else has been replaced, or repaired, may be something with the shock valving that is not allowing the shock to control itself correctly as speed increases.

Unfortunately, the only way to confirm that would be to pull the shocks and have them run through a shock dyno test.

 

When you purchased the vehicle did it have a wobble in the front end?

 

The speed factor might related to front end lift from aerodynamics.

He says its a wobble, not a vibration. They are different. Also the rear spoiler deploys at 75mph. Pushing down on the rear and lighten the front.

 

I high end indy shop or a dealer have equipment that can test the rack.

A bad steering rack is still my guess.

 

I'm not 100% certain. My guess is probably yes.

Thanks for the input. I'm going to try and find a nearby shop that can look at that specifically...



Here is my current alignment (I've been through at least 4-5 alignments since the beginning of this, never a fix), I'll go add this to the 1st post as well.

 

That's the first thing that I would remember is a wobble in the front end when purchasing the car. So I don't think it was there. Something went wrong somewhere.

 

Alignment looks good. When you have the rack checked also check the rack mounts.

As Blockhed wrote CarFax isn't perfect. It is possible a previous owner hit a curb and had suspension parts replace but the impact may have tweaked the rack.

 

I drove around with terrible front toe alignment and did not get a wobble. It's got to be a worn out part somewhere.

 

Car running and stationary, if you turn the wheel side to side, can you feel anything?

 

Understood, this is a puzzle for sure.

 

has the same shop been rebalancing the tires? Has anyone put a dial indicator on the brake disc flange or hub flange to check for runout?

 

Yes, I was thinking this should be checked as well. He might have a bad rotor.