Hi Veltro!
you should see if the landing gears are relationated with Fuselage...(eh, i think you alredy now...but you can be missing it)
For example the F-4U:
[Fuselage]
ModelNodeName=Fuselage
ShowFromCockpit=TRUE
HasAeroCoefficients=TRUE
MassFraction=0.33
(...)
[b]SystemName[005]=TailGear[/b]
[LeftWing]
ParentComponentName=Fuselage
ModelNodeName=Leftwing
ShowFromCockpit=TRUE
DetachWhenDestroyed=FALSE
DamageRating=DESTROYED
(...)
[b]SystemName[003]=LeftMainGear[/b]
[RightWing]
ParentComponentName=Fuselage
ModelNodeName=Rightwing
ShowFromCockpit=TRUE
DetachWhenDestroyed=FALSE
DamageRating=DESTROYED
MassFraction=0.107
HasAeroCoefficients=TRUE
LiftSurface=TRUE
(...)
[b]SystemName[003]=RightMainGear[/b]
// Gears
[b][TailGear][/b]
SystemType=LANDING_GEAR
Retractable=TRUE
DeployTime=5.0
AnimationID=1
DragArea=0.25
HideGearNode=TRUE
ModelNodeName=RearStrut
InsideNodeName=
//ShockTravelAxis=Z-AXIS
ShockNodeName=Rearpiston
//ReverseShockOrientation=TRUE
ShockAnimationID=4
ShockStroke=0.2
SpringFactor=6.0
DampingFactor=2.0
WheelNodeName=RearTire
//RotationAxis=X-AXIS
RollingRadius=0.12
CastoringWheel=TRUE
CastoringNodeName=rearpivot
CastoringAxis=Z-AXIS
Steerable=TRUE
MaxSteeringSpeed=50.15
Locking=TRUE
MaxSteeringAngle=-45.0
InputName=YAW_CONTROL
ControlRate=1.0
HasBrakes=FALSE
RollingCoefficient=0.05
MaxDeploySpeed=139.83
[[b]LeftMainGear[/b]]
SystemType=LANDING_GEAR
Retractable=TRUE
DeployTime=5.0
AnimationID=1
DragArea=0.70
HideGearNode=TRUE
ModelNodeName=LeftMainGearStrut
InsideNodeName=
ShockNodeName=LeftMainGearActuator
ShockAnimationID=2
ShockStroke=0.20
SpringFactor=6.0
DampingFactor=2.0
WheelNodeName=LeftMainGear
RollingRadius=0.38
CastoringWheel=FALSE
HasBrakes=TRUE
BrakingCoefficient=0.35
RollingCoefficient=0.05
MaxDeploySpeed=139.83
[b][RightMainGear][/b]
SystemType=LANDING_GEAR
Retractable=TRUE
DeployTime=5.0
AnimationID=1
DragArea=0.70
HideGearNode=TRUE
ModelNodeName=RightMainGearStrut
InsideNodeName=
ShockNodeName=RightMainGearActuator
ShockAnimationID=3
ShockStroke=0.20
SpringFactor=6.0
DampingFactor=2.0
WheelNodeName=rightMainGear
ReverseModelOrientation=TRUE
RollingRadius=0.38
CastoringWheel=FALSE
HasBrakes=TRUE
BrakingCoefficient=0.35
RollingCoefficient=0.05
MaxDeploySpeed=139.83