Originally Posted by
Geezatec
Still noisy at neutral? Or noisy at end travel? Remove the horns, noisy still? If quiet, something binding the steering or throttle& brakes.
Agree with what Geez is saying, make sure you don't have any binding in your steering system and that your servo horn is tight but not overtight (binded).
My B5M has a Savox SV-1273TG Digital servo on it and it is very loud as well. Just seems that some manufacturers are louder than others. Once mine is centered it stops whining (for the most part) but any pressure on it and it whines pretty loud trying to counter the pressure.