I have noticed a high pitch whistle in second gear for the last 15-20K miles. Under moderate acceleration I would hear it sometimes, but realized now that I can duplicate the issue by manually placing the engine in 2nd gear and accelerating up through 5000RPM. The noise because noticeable around 3500-4000 RPM. I have 25K miles on my 2014 V6 3.6L Jeep now. I'm wondering if this noise indicates a future reliability issue with the transmission? Anybody else notice this on their V6 Jeep?
I took a video of the noise through a few different accelerations. The one at the end is the most noticeable.