I took my '16 AWD in for the same problem, Vibration and noise around 30mph. They found a TSB for the fix and it says to replace the drive shaft and if that doesn't fix the problem it lays out other repairs. The TSB is 20-DS-002H, and you can just google that number and read through it, it is dated Sept 2020...see attached file.Recently took my '15 3.8 AWD in for this issue, and provided the sheet that rojo2223 provided in another thread.
They claimed that by replacing some bolts on a heatshield they were able to fix the issue. I took it out for a test drive in busy traffic and couldn't really hear it, but of course, this morning on my drive to work (mostly through town, so all 25-35mph speed limits) it's all I can hear.
So TL;DR: It's definitely not the heatshield.
have you figured out the problem? i'm having same issue with my 2016My car is 3.8 AWD, 2015. I bought 3month ago. I run 5K mile now.
When I drive 25-30ML/H, I can heard strange clicking sound in rear bottom part from 3K mile.
I have been dealer shop several times, Then can not solve it still now.
I searched on Internet blog. someone told me that noise come from 4WD Motor, someone propeller shaft or drive shaft. But they say this problem occurred
again after replaced these part.
I can heard well in the morning before engene heated.
I uploaded on YouTube to explain.
Does anybody figure out these problem?
thank you.