(RESOLVED) 6x6 powertrain problems, help! (Devs needed) (file included)

Im making a 6x6 mod, the powertrain is setup correct all wheels connected and drive when lifted off the ground, but for some reason only the front 2 wheels get 90% of the power, also if I test driving it against a wall to spin the tires, the 2 front wheels spin but the rear 4 wheels are stationary, this despite the drivetrain is AWD with all transfer cases and diffs locked.

EDIT:
Here is the powertrain isolated from the jbeam files, from the gearbox to the wheels

Code:

//Powertrain for 6x6 from gearbox to wheels - all gearRatio set to "1", all diffs and transercases locked, all friction set to "0"

//Transmission: transfercase to driveshaft_F / transfercase to driveshaft_R
    },
    "slotType" : "schoolbus_transfer_case_6x6",
    "powertrain" : [
        ["type", "name", "inputName", "inputIndex"],
        ["differential", "transfercase", "gearbox", 1, {"diffType":"locked", "lockTorque":10000, "friction":0, "uiName":"Transfer Case", "defaultVirtualInertia":2}],
        ["shaft", "driveshaft_F", "transfercase", 1, {"breakTriggerBeam":"driveshaft_F", "uiName":" Driveshaft", "electricsName":"driveshaft_F", "friction":5}]
        ["shaft", "driveshaft_R", "transfercase", 2, {"breakTriggerBeam":"driveshaft_F", "uiName":" Driveshaft", "electricsName":"driveshaft_F", "friction":5}]

//Front Setup:
    ],
    "powertrain" : [
        ["type", "name", "inputName", "inputIndex"],
        ["differential", "differential_F", "driveshaft_F", 1, {"diffType":"locked", "gearRatio":1, "lockTorque":10000, "friction":0, "uiName":"  Differential","defaultVirtualInertia":2}],
    ],
    "powertrain" : [//front wheels
        ["type", "name", "inputName", "inputIndex"],
        ["shaft", "wheelaxleFL", "differential_F", 1, {"connectedWheel":"FL", "breakTriggerBeam":"axle_FL", "friction":0}],
        ["shaft", "wheelaxleFR", "differential_F", 2, {"connectedWheel":"FR", "breakTriggerBeam":"axle_FR", "friction":0}],

//Rear Setup:
    ],
    "powertrain" : [//to front rear diff
        ["type", "name", "inputName", "inputIndex"],
        ["differential", "transfercase_R", "driveshaft_R", 1, {"diffType":["locked"], "lockTorque":10000, "friction":0, "uiName":"Transfer Case", "defaultVirtualInertia":2}],
        ["differential", "differential_R_1", "transfercase_R", 1, {"diffType":"locked", "gearRatio":1, "lockTorque":10000, "friction":0, "uiName":"  Differential","defaultVirtualInertia":2}],
    ],
    "powertrain" : [//front rear wheels
        ["type", "name", "inputName", "inputIndex"],
        ["differential", "differential_RL", "differential_R_1", 1, {"diffType":"locked", "gearRatio":1, "lockTorque":1000000, "friction":0, "uiName":" Differential","defaultVirtualInertia":2}]
        ["differential", "differential_RR", "differential_R_1", 2, {"diffType":"locked", "gearRatio":1, "lockTorque":1000000, "friction":0, "uiName":" Differential","defaultVirtualInertia":2}]
        ["shaft", "wheelaxle_RL1", "differential_RL", 1, {"connectedWheel":"RL1", "breakTriggerBeam":"axle_RL_1", "uiName":"  Left Axle", "friction":0}]
        ["shaft", "wheelaxle_RL2", "differential_RL", 2, {"connectedWheel":"RL2", "breakTriggerBeam":"axle_RL_1", "uiName":"  Left Axle", "friction":0}]
        ["shaft", "wheelaxle_RR1", "differential_RR", 1, {"connectedWheel":"RR1", "breakTriggerBeam":"axle_RR_1", "uiName":"  Right Axle", "friction":0}]
        ["shaft", "wheelaxle_RR2", "differential_RR", 2, {"connectedWheel":"RR2", "breakTriggerBeam":"axle_RR_1", "uiName":"  Right Axle", "friction":0}]
    ],
    "powertrain" : [//to intershaft - to rear rear diff
        ["type", "name", "inputName", "inputIndex"],
        ["shaft", "intershaft", "transfercase_R", 2, {"electricsName":"intershaft", "breakTriggerBeam":"intershaft", "uiName":"Inter Axle Driveshaft", "friction":2}],
        ["differential", "differential_R_2", "intershaft", 1, {"diffType":"locked", "gearRatio":1, "lockTorque":10000, "friction":0, "uiName":"  Differential","defaultVirtualInertia":2}],//WELDED CODE
    ],
    "powertrain" : [//rear rear wheels
        ["type", "name", "inputName", "inputIndex"],
        ["differential", "differential_R_RL", "differential_R_2", 1, {"diffType":"locked", "gearRatio":1, "lockTorque":1000000, "friction":0, "uiName":" Differential","defaultVirtualInertia":2}]
        ["differential", "differential_R_RR", "differential_R_2", 2, {"diffType":"locked", "gearRatio":1, "lockTorque":1000000, "friction":0, "uiName":" Differential","defaultVirtualInertia":2}]
        ["shaft", "wheelaxle_R_RL1", "differential_R_RL", 1, {"connectedWheel":"R_RL1", "breakTriggerBeam":"axle_RL_2", "uiName":"  Left Axle", "friction":0}]
        ["shaft", "wheelaxle_R_RL2", "differential_R_RL", 2, {"connectedWheel":"R_RL2", "breakTriggerBeam":"axle_RL_2", "uiName":"  Left Axle", "friction":0}]
        ["shaft", "wheelaxle_R_RR1", "differential_R_RR", 1, {"connectedWheel":"R_RR1", "breakTriggerBeam":"axle_RR_2", "uiName":"  Right Axle", "friction":0}]
        ["shaft", "wheelaxle_R_RR2", "differential_R_RR", 2, {"connectedWheel":"R_RR2", "breakTriggerBeam":"axle_RR_2", "uiName":"  Right Axle", "friction":0}]

Below are the problems with the powertrain with an example to reference.

Video of 6x6 locked with front wheel spin under load


Video of 6x4 RWD one axle spinning under load


Video of correct operation from a mod, 8x8 locked all wheels spin under load

 

Could you please provide the screenshot with drivetrain loaded with moderate throttle, and a jbeam file if necessary

 

I updated the OP with lots of info and a link to a powertrain file jbeam, if anyone wants to test the full mod let me knw i can PM it, its unfinished and includes alot of working files like Blender files and Photoshop files.

 

A lock torque setting of 10000 might be too low for the transfer case and differentials.

The semi's transfer-case is at 100000, and the diffs are at 5000000. Don't forget torque gets multiplicated the further down the driveline you go.

As for debugging tips, lifting the car off the ground can also help to see if things are connected properly. If something's not spinning at the correct speed, or spinning the wrong way, it's easier to spot. On the ground that often just results in weird behavior and binding.

 

Thanks i will try these!

It didn't work it still behaves the same, but when suspended in the air all there is something odd with the front wheels, they spin at 140mph while the rest spins at 20mph..



EDIT: It works!

after hours of frustration I found the issue.

I had to replace this:
{"diffType":"locked", "lockTorque":10000, "friction":15, "uiName":"Transfer Case", "defaultVirtualInertia":2}],

with this:
{"diffType":"locked", "gearRatio":3, "friction":15}]


for the differentials, and i also had gearRatios in the wrong section. I don't know why it works now, seems like the lockTourqe is needed but by leaving it out my setup works now, all wheels spin under load.