2016 Yukon Denali Transmission Shudder

[mcheck14]

I'm sure this has been discussed on here before but recently in the past week I have been noticing a shudder in the transmission. A quick search online tells me this is a known issue with the 8 speed and has a class action lawsuit pending along with multiple TSB's released by GM. I have the shudder issue and hard shift into gear every now and then. Has anyone had any luck on fixing this problem?

2016 Yukon Denali w/ 61,000 miles

I'm looking for some input before I take it into the dealership.

Any recommendations would be greatly appreciated.

 

[GreyStone]

...

 

[Tahoe14]

GM has a newer fluid that was designed to address the 8speed transmission issues. Your Dealer should be aware of it.

 

[Denali Brad]

I had the same problem with my 2016 8 speed. Going down the highway it would feel like you kept hitting the rumble sticks.

There is a TSB and the fluid flush and change fixed it....the occasional hard shift remains though.

Good luck.

 

[CMoore711]

They performed the TSB trans fluid change and also reprogramed the TCM on my 2015 Denali with the 8 speed, this would have been around 48K-ish miles. Surprisingly it took care of the issue and currently at 97K and they haven't came back.

 

[mcheck14]

Awesome! Thanks for the feedback fellas!

 

[sealandsky]

Awesome! Thanks for the feedback fellas!

If the shudder is happening on the highway it could also be the lock-up torque converter clutch failing. My 2016 Denali was doing that when I traded it in at 38,000 miles.

 

[dcyy]

I'm sure this has been discussed on here before but recently in the past week I have been noticing a shudder in the transmission. A quick search online tells me this is a known issue with the 8 speed and has a class action lawsuit pending along with multiple TSB's released by GM. I have the shudder issue and hard shift into gear every now and then. Has anyone had any luck on fixing this problem?

2016 Yukon Denali w/ 61,000 miles

I'm looking for some input before I take it into the dealership.

Any recommendations would be greatly appreciated.

Same thing happened to my 16 -TSB 16-NA-175 is the bulletin that addresses the problem.The dealer not only replaced the tranny fluid,they also replaced the torque converter-problem solved.

 

[mcheck14]

UPDATE: Just got it back today. They did the transmission flush. Everything seems to be OK so far. They ended up covering the cost of it since I was only a 1,000 miles out of warranty.

 

[jerryhipp]

im having this issue. only problem is mine is a 2015 6spd.