when i am climbing the aircraft is fine and when it stops climbing the aircraft starts to move left and right very quickly how can i fix this and is anybody having this problem.

when i view the wing and then go back into the cockpit it goes away for a few moments the its back.i did turn off turbulenceit looks like it is the yaw damper because it is move left and right very quickly can this be fixed.when i turn the yaw damper off the plane is fineit happens only when i am in the vc and it is defiantly the yaw damper