SCX24 130 Motor Dual-Speed Variable Gearbox 72T with Flat Head Hex 210MM 4P, Cup Head Hex 1.46MM 4P, and Black Gearbox Base 1P suit for AXI90081 AXI00001 AXI00002 AXI00005 AXI00006 AXI00007 72T 130 Motor with 10% increased torque compared to the original, mechanical high-low gear shift, compatible with the original remote control gear shift, gear shift servo connected to the receiver's AUX channel. It requires the removal of the electronic speed control mounting plate and battery mounting plate for installation, and you need to find your own installation position for the electronic speed control or purchase the RCAWD kit