Long overdue update.
tl;dr - Tried a bunch of things, but I still have the vibration. UGH.
I got my vehicle back last Friday after being in service for 12 days. A lot of the time was spent waiting for responses from techline, and then waiting for parts to arrive. The three fixes that were tried were:
- New Driveshaft - did not solve the problem
- New AWD coupler - did not solve the problem
- New New AWD coupler - basically the same part as #2, but supposedly with a new "lot number" which was better/improved
The dealer felt the issue was resolved and gave me the car back, but upon driving it a few hundred miles at highway speed since then I'm still noticing the hum/vibration when I get to ~72mph
So at some point I'll need to give it back to them for another round of investigation and repair. Pretty frustrating experience that they can't figure out the issue and fix it.
At this point I am very much in a love/hate relationship with my Telluride. I love the experience at sub-highway speeds and still think it's better than anything the competition offers, but the sheer number of big and little issues I've had (including a camera flicker thing that is still not fixed) is getting frustrating and is not confidence inspiring for the long term.
I've explored lemon law and whether the above repairs counts as "3 failed attempts," but it seems that's a pretty generous interpretation that won't hold up. So for now it's back to the shop at some point to give it another attempt.