Drive Train Binding

Drive Train Binding

Remove the pinion gear from the motor (not necessary with nitro vehicles) and roll the vehicle on a flat surface to make sure the drive train is free and not binding. For boats, turn the prop(s) by hand. The prop shaft should turn very freely with no binding. If binding is evident check the belt pulleys, (or prop shafts for boats) for small objects or debris. In some cases weeds, thin roots or vines can get stuck between the axle drive pins and molded hex wheel adapters. Floating objects such as plastic wrappers or fishing line can get caught up in the prop shafts on boats. Remove the wheels (or props) and check for debris that may prevent the wheel (or prop) from rotating.

it's also very possible that the motor is binding - not the drive train. Put the pinion gear back on the motor and try to spin the pinion gear. If the motor is binding, give it a thorough cleaning with motor spray and then re-lube the bushings with light machine oil and try again. If a thorough cleaning doesn't fix the binding problem, replace the motor.