I’ve had that before and have had to replace the GPS/IMU board. Mine didn’t get anywhere close to 94% though. The fact that it’s calibrating in the wrong orientation indicates that the IMU is broken.
I get it without the camera. Switching the camera to the new gimbal is easy but threading the cable through the new gimbal takes time. Either with a new gimbal or replacing a motor you’ll need to remove error 40011 with paid software. You can...
Instead of stopping the vibration, gently place a finger on each motor location while it’s buzzing and you should be able to feel which place is vibrating the most. After trying to fix about 10 buzzing or outright broken plastic of these gimbals...