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sounds like your brakes are not releasing properly
It Takes A Lot Of Practice To Sound Like Demi Lovato.
Could be the brakes are metal to metal.
Sounds like you need to replace your brakes very soon. You may need to replace hubs as well.
you sound like a negro to me.
vaccum leak possibly
It's hard to diagnose without hearing the noise, but if you're sure that it is not the brakes, it could be dirt/sand/rock in the brakes. If you're hearing the sound all the time (even when not applying the brakes), it could be wheel bearings.
It sounds like the brake system is not releasing, as if you kept your foot on the pedal. Check to see that the pedal is coming all the way up, and that the master cylinder isn't sticking and keeping the brakes on.
You may need to check your brakes or the rollers on your brakes
you need brake pads
Sounds like it could be a frozen caliper or mis-adjusted brake shoes
It is the exact opposite, it is releasing the excessive boost pressure through its dump valve.