Gearbox adjustments

Discussion in 'Content Creation' started by NinetyNine!, May 31, 2016.

  1. NinetyNine!

    NinetyNine!
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    Vehicle Artist
    BeamNG Team

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    Feb 17, 2016
    Messages:
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    hey , i'm currently working on a new gearbox

    Code:
    },
    "pickup_transmission_4Avmsonoma": {
        "information":{
            "authors":"Ninetynine",
            "name":"4-Speed Automatic Sonoma-Sport Transmission",
            "value":500,
        },
        "engine":{
            "transmissionType":"automatic",
            "lowShiftDownRPM":1200,
            "lowShiftUpRPM":2300,
            "highShiftDownRPM":2000,
            "highShiftUpRPM":4800,
            // -1, 0 (neutral), 1, etc
            "gears":[-3.36, 0, 3.23, 1.88, 1.23, 0.89]
            "clutchDuration":0.12
            "viscousCoupling":12
            "lockingTorqueLimit":550
            "enableLocking":true
        },
        "slotType" : "pickup_transmission",
        "flexbodies": [
             ["mesh", "[group]:", "nonFlexMaterials"],
             ["pickup_transmission", ["pickup_engine","pickup_transmission"]],
        ],
        "nodes": [
             ["id", "posX", "posY", "posZ"],
             {"selfCollision":true}
             {"collision":true}
             //--4 Speed Auto-
             {"frictionCoef":0.5},
             {"nodeMaterial":"|NM_METAL"},
             {"nodeWeight":35},
             {"group":"pickup_transmission"},
             ["tra1", 0.0, -0.68, 0.48],
             {"group":""},
        ],
        "beams": [
              ["id1:", "id2:"],
              {"beamPrecompression":1, "beamType":"|NORMAL", "beamLongBound":1.0, "beamShortBound":1.0},
              //--TRANSMISSION CONE--
              {"beamSpring":12600840,"beamDamp":390},
              {"beamDeform":142500,"beamStrength":"FLT_MAX"},
              ["tra1","e1r"],
              ["tra1","e3r"],
              ["tra1","e1l"],
              ["tra1","e3l"],
              {"beamPrecompression":1, "beamType":"|NORMAL", "beamLongBound":1.0, "beamShortBound":1.0},
        ],
        "triangles": [
                ["id1:","id2:","id3:"],
        ],
    }
    }
    but the gearbox shifts a bit weird. (I've also got an engine for it)

    when it shifts it goes down from 4700 to 3900. but i want the rpm to go lower (to like 3000) after shifting. is there a specific part in the jbeam i have to adjust to make the rpm go lower?
     
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  2. synsol

    synsol
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    QA Lead
    BeamNG Team

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    Aug 4, 2013
    Messages:
    1,475
    Hi ,

    You have to adjust you gear ratios to match the values you want :

    030bf27035b4755de95965e1d561aeea.png
     
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  3. NinetyNine!

    NinetyNine!
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    Vehicle Artist
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    thanks , didn't know that this was an important factor too
     
  4. Chernobyl

    Chernobyl
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    What is the difference between a normal gearbox and this one?
     
  5. NinetyNine!

    NinetyNine!
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    Vehicle Artist
    BeamNG Team

    Joined:
    Feb 17, 2016
    Messages:
    1,350
    some adjustments like a shorter clutch duration etc. it's for a new configuration i'm working on
     
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  6. G-Farce

    G-Farce
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    Apr 1, 2016
    Messages:
    604
    If you want your shift from 3rd gear to 4th to set you in a lower rpm, you have to make the 4th gear longer. If fourth was 1.89 gear, to make it "longer" you'd reduce this number. Example 1.79 or 1.75 etc would make you start at a lower rpm for the 4th gear.

    If however you have all your gears setup in moreless the right rpms, but your car needs more top speed, simply make your final reduction gear longer. Though I'm not sure which value is this one.

    Edit:
    It could be the -3.36 value but then again that could also be the reverse gear.
     
    #6 G-Farce, Jun 14, 2016
    Last edited: Jun 14, 2016
  7. drperry

    drperry
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    Apr 7, 2016
    Messages:
    10
    Negative numbers are reverse... Don't forget, you can also add numbers for more gears... Works for forward and reverse as well. I've got a semi with 5 reverse gears, lol.
     
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  8. CreasingCurve

    CreasingCurve
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    Jan 19, 2016
    Messages:
    940
    The final drive ratio is usually located in the rear suspension file for rear wheel drives and some are in the engine file under the front diff in FWD cars.
     
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