Manual number: PD90439S1+PD90440S1 Product major function & usage:
1. The material is upgraded to steel #45 to make it more durable to use 2. The small bevel gears are modified to make to become 1 set for better power transfer The dimension is same as original This set of gears is first thing you need to change right after you open the box and start playing with the car, the original gears become defective quickly especially for this speedy crawler car.
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