2020 Telluride AWD rear end jerking thumping and vibrating

[MrMCar]

I posted this elsewhere not having seen this thread. Sorry for basically double posting.

Looking back through this, it looks like others have had this vibration issue "show up" down the road. Our Telluride is a 2020 that we purchased in January of 2020. So, as luck would have it, we're taking it to the dealership just a couple of weeks past the 5 year warranty mark.

Had no issues with high way speeds or accelerations for 4 years plus. Got new tires in November and have had issues since. I'm pretty confident that this is not a tire issue given that we've had them road forced balanced/checked 3 times now and the alignment done/checked twice. Vibration issue is similar to what I'm seeing here. Mainly highway speeds above 60. Totally disappears once you let off the accelerator. It's not always constant. On a recent 2.5 hour drive, it didn't happen too often. But on the way back, it was near continuous. between 60 and 85.

We're going in to the dealership for diagnosis. We've had good luck with this dealership, so I'm hoping this doesn't turn into a nightmare. Hopefully it's the TSB in play or something that falls within the powertrain warranty.

Suggestion:
Any time the tech spends trying to duplicate the issue, costs you $$$. You drive, get it to happen for the tech. Then let the tech drive and make it happen.
Easier for them to replicate, somewhat easier on your wallet.
Good Luck

 

[crimscrem]

Update in case others are curious.

Took it to the dealership service department (I drive out of my way to this one because the service has consistently been good). Luckily the service manager who I like having was familiar with this problem and had noted that they've seen this quite a bit. The service technician was able to experience the vibration on a drive. This was obviously important and good news because it didn't really do it on the drive over.

They couldn't just order the part and schedule because the TSB requires them to go through the diagnostic flow chart. So, I'll take it back in next week and pick up a loaner. If all goes well, the vehicle will be fixed and back to working properly by the end of next week.

 

[MrMCar]

Glad they're taking care of it.

Care to share any of the details about the TSB?

 

[crimscrem]

Glad they're taking care of it.

Care to share any of the details about the TSB?

I found it initially on this forum. But here's a link to it through the NHTSA: https://static.nhtsa.gov/odi/tsbs/2022/MC-10206644-0001.pdf

______________________________

 

[crimscrem]

Thought I would provide an update. The dealership kept my car for almost a month as they worked through things. Gave me a loaner, so no big deal. Early on the technician raised the thought that it was a front right axle that was the issue and not the TSBS involving the driveshaft and AWD coupler. They ended up replacing the front right axle under warranty. Haven't had the issue since the repair.