Hubwheels issue.

I have created a vehicle, it has a problem, I need 4WD, it only has 2WD, both hubwheel sections for the front and rear are the same. I only seem to get RWD. How could I go about fixing this problem?

Front Hubwheels

Code:

"hubWheels": [        ["name","group","node1:","node2:","nodeS","nodeArm:","wheelDir"],
        {"enableTireSideSupportBeams":true},
         
        //general settings
        {"radius":0.84},
        {"hubRadius":0.35},
        {"wheelOffset":0.00},
        {"hubWidth":1.1},
        {"tireWidth":1.1},
        {"numRays":14},
         
        //hub options
        {"hubBeamSpring":5081000, "hubBeamDamp":16},
        {"beamSpring":1081000, "beamDamp":16},
        {"hubBeamDeform":360000, "hubBeamStrength":1120000},
        {"beamDeform":240000,"beamStrength":380000},
        {"hubNodeWeight":12.0},
        {"hubNodeMaterial":"|NM_METAL"},
        {"hubFrictionCoef":0.7},
         
        //tire options
        {"wheelTreadBeamSpring":1681000,"wheelTreadBeamDamp":90,"wheelTreadBeamDeform":250000,"wheelTreadBeamStrength":340000},
        {"wheelPeripheryBeamSpring":281000,"wheelPeripheryBeamDamp":90,"wheelPeripheryBeamDeform":250000,"wheelPeripheryBeamStrength":340000},
        {"springExpansion":1081000, "dampExpansion":18},
        {"nodeWeight":12.0},
        {"nodeMaterial":"|NM_RUBBER"},
        {"frictionCoef":1.7},
         
        //
        {"pressurePSI":10},
        {"maxPressurePSI":1500},
        {"reinforcementPressurePSI":31},
        {"pressureSpring":2601000},
        {"reinforcementPressureSpring":144000},
        {"pressureDamp":90},
        {"reinforcementPressureDamp":90},
         
        //rear
        {"selfCollision":false}
        {"collision":true}
        {"axleBeams":["axle_a_FL","axle_b_FL",]}
        ["FL", "wheel_FL", "WF0", "WF2", 9999,  "n72", 1],
        {"axleBeams":["axle_a_FR","axle_b_FR"]}
        ["FR", "wheel_FR", "WF1", "WF3", 9999,  "n72", -1],
        {"axleBeams":[]}
        {"propulsed":0}
        {"enableABS":false}
        {"selfCollision":true}
],

Rear

Code:

"hubWheels": [        ["name","group","node1:","node2:","nodeS","nodeArm:","wheelDir"],
        {"enableTireSideSupportBeams":true},
         
        //general settings
        {"radius":0.84},
        {"hubRadius":0.35},
        {"wheelOffset":0.00},
        {"hubWidth":1.1},
        {"tireWidth":1.1},
        {"numRays":14},
         
        //hub options
        {"hubBeamSpring":5081000, "hubBeamDamp":16},
        {"beamSpring":1081000, "beamDamp":16},
        {"hubBeamDeform":360000, "hubBeamStrength":1120000},
        {"beamDeform":240000,"beamStrength":380000},
        {"hubNodeWeight":12.0},
        {"hubNodeMaterial":"|NM_METAL"},
        {"hubFrictionCoef":0.7},
         
        //tire options
        {"wheelTreadBeamSpring":1681000,"wheelTreadBeamDamp":90,"wheelTreadBeamDeform":250000,"wheelTreadBeamStrength":340000},
        {"wheelPeripheryBeamSpring":281000,"wheelPeripheryBeamDamp":90,"wheelPeripheryBeamDeform":250000,"wheelPeripheryBeamStrength":340000},
        {"springExpansion":1081000, "dampExpansion":18},
        {"nodeWeight":12.0},
        {"nodeMaterial":"|NM_RUBBER"},
        {"frictionCoef":1.7},
         
        //
        {"pressurePSI":10},
        {"maxPressurePSI":1500},
        {"reinforcementPressurePSI":31},
        {"pressureSpring":5601000},
        {"reinforcementPressureSpring":144000},
        {"pressureDamp":490},
        {"reinforcementPressureDamp":90},
         
        //rear
        {"selfCollision":false}
        {"collision":true}
        {"axleBeams":["axle_a_RL","axle_b_RL",]}
        ["RL", "wheel_RL", "WR0", "WR2", 9999,  "n72", 1],
        {"axleBeams":["axle_a_RR","axle_b_RR"]}
        ["RR", "wheel_RR", "WR1", "WR3", 9999,  "n72", -1],
        {"axleBeams":[]}
        {"propulsed":0}
        {"enableABS":false}
        {"selfCollision":true}
],

Also, how would I go about setting it up like it has a locked differential instead of open?