Approximately 3 weeks ago I started hearing a loud hum as I accelerated or held a constant speed. At first it was a now and again thing which grew more and more constant as time went on. It grew into a screeching sound, which I assumed must have meant my brakes were worn. I brought it in and was told my front brakes were 95% gone and my back brakes only 50%. A week ago I had my front brakes replaced, a brake system flush and my back rotars resurfaced. As soon as I left the noise showed up and was constant the entire week. I brought it back and they resurfaced the front rotars and took apart both the front and back brakes and relubed them both. The noise seemed to be gone the first 10 minutes driving home then it faintly started coming back. By the time I was a couple roads from home it was the exact constant loud noise I've heard the last few weeks.
A description of the noise: At first was just a high pitched hum which is now a screeching noise which sounds like bad brakes.
The noise is only when I accelerate slowly or stay at a constant speed. It doesn't make the noise if I accel quickly. At first I thought 2000 1999 Manual Motor Lexus ES300 Parts Screeching Sell Car braking made it stop but have since realized it's not the brakes that make it stop but simply releasing the accelerator/gas pedal. It stop immediately when I let off the gas.
It seems to come from the front of the car and is not associated with the A/C - still makes the exact same noise if A/C is shut off.
If you have any suggestions please reply. This constant screeching sound is driving me insane and my repair shop can't seem to figure it out. They keep swearing up and down it has to be the brakes but even after new brakes, a brake flush and relubing the noise is still the exact same.
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