Hello. My car goes through 1st, 2nd, 3rd, 4th and 5th gears easily while driving on automatic. However, when it shifts to 6th gear, it suddenly squeals 5000 times at 2000 rpm, as if the clutch is stuck. I've seen it from 3 transmission technicians. They wanted to connect a computer and diagnose the error code, and the error codes were 1749-1723. I'll take it to another technician who will do a transmission robotic or ECU check. What could be the reason? Best regards. My car is a 5008 and a 2011 model.