Step 1
Step 2
Step 3
Step 4
Step 5
Step 6
Step 7
Step 8
4. Replace the gear box
a. Per the above step, unlock the 6pcs screws
b. Disconnect the plug of the battery and gear box
c. Disconnect the battery wire, then disassemble the driving wheel and rear wheel, then pull out the rear axle.
d. Unlock the screws of the grey plastic box, then open it to get the gear box.
Step 9
