Rotate GameObject with controller of HTC vive

I'm using the HTC Vive and I want to rotate a valve's wheel with the controller position of HTC vive. I tried to calculate the angle between the different position of the controller and the center of the wheel. And after I make the rotation of the wheel. It's work but i have always a difference between the controller and the wheel position. The wheel don't rotate enough. The Wheel need to rotate only in Y axis.

Thank's for your help!

float angle; Vector3 axis;

                 Vector3 relativePos = (grabbingObject.transform.position - this.transform.position);
             float calculateAngle = Vector3.Angle(oldRelativePos, relativePos);

             Vector3 cross = Vector3.Cross(oldRelativePos, relativePos);
             if (cross.y < 0) calculateAngle = -calculateAngle;

             oldRelativePos = relativePos;
             Quaternion rotation = new Quaternion();
             if (calculateAngle != 0)
             {
                 rotation.eulerAngles = new Vector3(0, calculateAngle, 0);


             }
                 rotation.ToAngleAxis(out angle, out axis);

                 angle = (angle > 180 ? angle -= 360 : angle);

                 if (angle != 0)
                 {
                     Vector3 angularTarget = angle * axis;
                     rb.angularVelocity = Vector3.MoveTowards(rb.angularVelocity, angularTarget, 1000f);
                 }