I want to know why it is that every time I go into slew mode in FSX, my plane starts spinning violently all over the ramp. I recently purchased the Thrustmaster TCA Sidestick and the TCA Throttle Quadrant, and this is when the problem started. I know the problem is caused by one of these 2 devices because when I disable the Controllers in FSX, the spinning stops and slew mode works just fine. I've already read reports that the controller need to be calibrated and that is not the problem here. They have all been calibrated and the controls work just fine, and I don't see what calibration has to do with this problem. Every time I want to make adjustments in the GSX program, my plane starts spinning everywhere, and I'm getting fed up with this. I've searched the problem and there have been NO logical solution to this problem and it's not  hardly mentioned, and nobody seems the know what the problem is except to say that it needs calibrated. Will someone that knows about this problem tell me what's happening and how to fix it.

Ken.

Usually this is caused by having an unintended axis assignment for one or more of the controller axes. 

In the ESP sims (FSX/P3D) there's a separate set of control assignments specific to slew mode--you should check every controller attached to the PC (including game controllers) in the sim controls menu and ensure that nothing is assigned to the axes in slew mode that you don't intend to be assigned.  FSX will automatically assign axes when a new controller is detected--that's often the culprit.