[PhysX 3.2] Vehicle : always same gear ratio when accelerating using auto gears. [SOLVED]

Gaming and Visualization Technologies APIs Physics Modeling (closed)
1

When accelerating, using auto gears, I can see the vehicle decelerate during the switch time, but the new gear is still eFIRST,
So the current gear is always eFIRST.
What can cause this, please ?
Thanks

[EDIT]
Here’s the code of the input :

int g=((PxVehicleDrive4W *)v->physicsModel->vehicle)->mDriveDynData.getCurrentGear();
		ODS_int(g);
		float speed=v->physicsModel->vehicle->computeForwardSpeed();

		if (fabsf(speed)>0.1f && ((engine.input.keyboard[VK_UP] && speed<0.0f) || (engine.input.keyboard[VK_DOWN] && speed>0.0f)))
		{
			v->physicsModel->input.setDigitalAccel(false);
			v->physicsModel->input.setDigitalBrake(true);
		}
		else if (engine.input.keyboard[VK_UP])
		{
			if (g<2) ((PxVehicleDrive4W *)v->physicsModel->vehicle)->mDriveDynData.forceGearChange(2);
			v->physicsModel->input.setDigitalAccel(true);
			v->physicsModel->input.setDigitalBrake(false);
		}
		else if (engine.input.keyboard[VK_DOWN])
		{
			if (g) ((PxVehicleDrive4W *)v->physicsModel->vehicle)->mDriveDynData.forceGearChange(0);
			v->physicsModel->input.setDigitalAccel(true);
			v->physicsModel->input.setDigitalBrake(false);
		}
		else
		{
			v->physicsModel->input.setDigitalAccel(false);
			v->physicsModel->input.setDigitalBrake(false);
		}

… and when accelerating with starting gear=eFIRST, g is always eFIRST (2)

[EDIT2]
My mistake, I didn’t notice eNEUTRAL (1) was applied when switching gears, so changing :
if (g<2) ((PxVehicleDrive4W *)v->physicsModel->vehicle)->mDriveDynData.forceGearChange(2);
with
if (!g) ((PxVehicleDrive4W *)v->physicsModel->vehicle)->mDriveDynData.forceGearChange(2);
solved the problem.

Thanks anyway.