SG4 SR4 adopts G1 and G2 two new drive axles according to different configurations. G1 all-metal bridge is made of aluminum alloy CNC CNC machining, with hardened helical steel teeth; G2 bridge is reinforced nylon injection molding shell, high-hardness stainless steel powder metallurgy gear, reaching the hardness level of HRC35 or above, adapting to various difficult road conditions. At the same time, the G2 bridge has the "reverse transmission" function, and with the new transfer case, the original factory reverse transmission function can be realized on the SG4, which can better improve the influence of the "axis effect" on the vehicle attitude.