Transmission Noise problems of the 2014 Toyota Corolla

A whistling noise coming from the transmission I took the car in and the dealer told me the it was the trans. So they change the trans. With a new and the same thing the dealer told me the Toyota knows about the problem my car has been in the shop five times for this problem and still to this day no fix for it. The whistling sound starts in any gear and is very loud and this is a (new car). This is a 2014 Toyota Corolla sounding like this. I'm afraid that the trans. May stop pulling while I'm driving in traffic which could cause and accident.

After being driven for less than 200 miles of being received from dealership for a defective cvt transmission replacement, difficulties to keep the car going straight suddenly appeared, trying to do so caused it to pull the opposite during a suburban trip in a high speed way, so had to be driven to a safer place, (getting worse rapidly), and making clunking metallic noises on the front end when turning at corners and braking, and a loud humming noise when braking from highway speed (appeared at the same time and as sudden as the steering situation) to a full stop or from highway speed to a sudden lower one due to congestion. All this happened to appear on this last trip. Had to be towed back to the dealership. Condition showed up during a continuous rainy condition, perceived like a total loss of front end alignment, plus the noises. As of the writing of this message, just a few hours have passed after the incident happened, but because of the potentially dangerous "collision situation " experienced, due the speed of the highway in which this condition suddenly appeared (nothing warned about something wrong going before) is this report being sent. Maybe caused by or related to the procedure executed during the previous cvt transmission replacement, (my opinion) has not yet been diagnosed by the dealership.