Thanks for providing this forum to ask this question.  I previously posted about this a couple of months ago and tried a few fixes, but nothing has worked so far, and frankly I’m ready to give up on this car.

My car shakes badly in the front when it goes above 40-45 mph and gets worse over time as I keep driving.  It goes away once I go below ~30 mph.  The shaking sounds and feels like a warping, a bit like a coin being spun on a table as it’s slowing down and getting ready to land on its side - or like a helicopter-ish sound.  More recently, the sensation comes right through to the steering wheel and right behind the speedometer, where a jingling-like sound comes through, like loose rings or coins.

it started a year ago (I’ve owned the car for 9 years - it was previously very reliable before all this), and since then, the following has been done.  The problem would go away for a while, but then come back worse:

- Front brake calipers & rotors & hoses replaced

- tires rotated several times

- alignment performed

- right hub wheel bearing replaced

- other suspension components inspected, no problems detected

- no apparent problems with tires - they are 6 years old but look ok in terms of tread and wear

i am wondering if it could be a problem somewhere under the hood (engine or transmission).  The car makes a sharp, rough popcorn-ish sound after it’s started, when it first moves after shifting into drive, especially if it hasn’t been started for at least a day. I didn’t think it was anything to be concerned about, but folks who’ve heard the sound say it sounds strange, and it does seem to be a recent thing.

Thanks - Any insight that anyone has is greatly appreciated!