Transmission Whine

[15denali]

I have had problems with the driveshaft and have been stuck a few times in the snow trying to get into my driveway. When I leave it in 4Auto it feels and sounds like 4 hi. I am still having that issue.

I also have this terrible sounding whine coming from under the car. Sounds like a trans problem, but I hear it even when in park and bringing it up to 3-4k. anyone find a solution to these problems?

Thanks
J

 

[BobMc]

http://www.tahoeyukonforum.com/threads/2015i-tahoe-ltz-transmission-noise-18-000-miles.87628
Take a look at my post.
Right now my Tahoe is at the dealer awaiting some sort of a decision from GM--New transmission or buy back??--and I am in a loaner 2017 Tahoe.

 

[GMCKSOwner]

http://www.tahoeyukonforum.com/threads/2015i-tahoe-ltz-transmission-noise-18-000-miles.87628
Take a look at my post.
Right now my Tahoe is at the dealer awaiting some sort of a decision from GM--New transmission or buy back??--and I am in a loaner 2017 Tahoe.

I have a 15 yukon denali and the transmission whine is noticed 10-20mph. Was told this is to be expected on the yukons as it develops over time from the dealer. GM has denied to acknowledge issue and stated that its functioning as expected.

 

[zac73]

2015 Yukon Denali around 40,000 miles...

I'm having a similar issue, with the whining being most noticeable during deceleration around 1500 RPM (maybe because of reduced engine noise vs acceleration). I googled around and found what appears to be a bulletin addressing my issue.

http://gm.oemdtc.com/3002/15178-transmission-gear-whine-noise-2015-cadillac-chevrolet-gmc