Ok...The front tires are new and were balanced and checked by two different Goodyear shops (a total of 4 times) and confirmed they are perfectly balanced and round. My car still has steering wheel vibrations and front end shaking starting at 70 and disappears at 80. It sort of feels like a typical out of balance tire/wheel.
So, the first suspect (front tires/wheels) is cleared. I'm thinking about what could be the next suspect? There must be an item that rotates - brake disc? half-shaft?
I don't remember how old are my brake discs but they were replaced long time ago due to pulsation braking. Probably close to 8-10 years ago. Drive shafts never give me problems, all boots are intact and no grinding or clicking sound while making turns. Also, the vibrations happens regardless of putting my right foot on the gas pedal or not. It will be there when the car is at that speed. When it vibrates, I lifted my foot completely off the gas pedal and I still feel the vibration until the car slows down below 70mph.
The suspension is old and likely worn but I think the vibration comes from a rotating part. Also, the outer steering ball joints are replaced not too long ago. The last mechanic did check on free play while he was checking the tires but didn't say anything afterwards. Anyone has any input? How to troubleshoot?
Thanks.- AC
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