inprogress

i bought my son an 18t 4x4 1:18 truck .we put a c4 brushless motor,some solid foam tires and a lithium 2c battery in..the biggest problem we have is too much power and we constantly sheer the spur gear.. the main gear in the motor is aluminum and the spur is plastic.. i know its better to ruin a $3 gear than something else but after 5 min of fun its another hour to replace the gear.. can anyone let us know what to do???