Car shaking while doing 55-70

[shiv618]

I have read ever forum about shaking while doing 55 n up but nothing, I have had two tire shipp and a Audi mechanic look at it n spend about 2k on the car still no help!! I drive a 2006 b7 s4, this is kind of long but shit is crazy!

It started when I got a flat ($$$) on my stock wheels I put a spare on n the car did shake at high speed but did wasn't the same as it is now.i kept the spare on until over the summer I got a set of 19" wheels with spacers $$$. The shaking is was crazy at like 55-65 so when back the to the tire shop(1).The tire shop(1) who put the tire on my car said that it might be brakes so I got both the brake and rotors done at the same time and also bought coil over at the same time $$$ . Once i got the brakes done and the suspenion put on I got the car back n still did the shaking so I took it too another tire shop(2) and had then check if the tires where balanced properly the first time and got a balance done . They said balance was a little off but they did it again $$$. So I got the car back still a lot of shaking talk tire shop (2) they say it's the spacers so remove spacers and drive no fix. I take of the 19" and the spacers and put the stock wheels on doesn't fix the shaking. So I take it to a Audi specialist Drive Auto Works in NJ, pay the man to check out the car completely,problem; car needs new tire rod links on both sides and new problem needs valve cover gaskets $$$$$$$$$. They fix it those problem but the shaking so they say it's my stock wheels are bent $$$. so now I buy new wheels use my old tire and still the shake.
Pleas help !!!!!

[ak-s4]

Road force test the wheels/tires.

Could be rear drive line, any of the axles/joints... A shop might be able to run the car up to speed and carefully monitor those items for visual vibrations or via sensors mounted to the wheels.

[Concavitor]

Time to take it to an Audi dealer.

[ASAP617]

I had a similar problem so hanged my tie rods, control arms, sway links, bearings and in the end it ended up being my two top power steering rack bolts. No more shake or rattle. Pedal to the medal

[FastEddie]

You eliminated a lot of quick guesses. Its not your wheels (unless you have 2 sets of bent wheels or seriously unbalanced wheels on two different sets). Its not your spacers because you said you drove the car with no spacers on.

Is the shaking coming from the front or back. Meaning do you feel it shaking more in the steering wheel or more in your seat? That might help with the location. Someone mentioned the steering rack possibly being loose and i have heard of a few guys with this problem. Might be worth checking out.

I know your probably tired of bringing it to shops but i HIGHLY recommend Tyrol Sport in Queens. They specialize in Suspension and i really think for your issue they would be able to help out. If you decide to try them out call and ask for Mike. Great dude and he might even try to help you over the phone and tell you some different things to look for.