Also, if your brake is set too high and you advance the throttle too abrupt, the screaming sound can occur when it tries to come off the brake. The fix is to introduce a slight delay in your throttle setting on your transmitter so it does not advance as fast as you move the throttle stick, reduce your brake a few percent, or both. I have had the screaming occur more than once on different esc/motor combinations and this has always worked for me. But make sure you fix it. I did not reduce throttle fast enough once and the motor seized and the esc burned out and both had to be replaced.

Good luck,

Sheldon