Hi people. Just hoping maybe somebody could shed some light on this problem.

I've had the wheels balanced, I've had two different sets of tires on the car, I've had the front end looked at numerous times and they always say there is nothing wrong. I just had it looked at again, and agin they cannot find anything mechanically wrong on the front end.
Could it be something in the power steering box?
I can feel the vibration ever so slightly when driving under 50mph, but increases greatly with the increase of speed.
It drives in a straight line, no wandering on the road.

Anyone have any clues as to what could be the problem?? Oh, and I might add it's been doing this ever since I got the car (nearly 2 years).

 

Check out the tie rod ends. This exact thing happened in my brother's cabriolet when he had it (mind you, it was FWD)... umm... the brake rotors could be unbalanced or warped, that might do it. even if you're not pressing the brake pedal, if they're warped enough.

 

Just had the brake pads replaced, discs machined, but they did show me a lot of rust/corrosion that had to do with the disc area (buggered if I know what it was).
I will look into that.
Thanks Fingers!