A screeching noise from the motor area of your YK8081 is often caused by a worn or stripped 13T Motor Pinion Gear (80038) . This is a common fault on high-power 1/8 scale trucks running the 2800KV brushless system, especially if the gear mesh is too tight or the pinion has worn from extended use . Inspect the pinion gear teeth – if they are pointed or missing, replace the gear immediately to avoid damage to the spur gear.
