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Discussion Starter #1
Looking for some help here.
2017 Traverse 95k
Transmission seems to be slipping(I’m guessing that’s what this is) between 2/3. Maybe other gears but I haven’t gotten it on the highway as my wife just told me about it so I drove it through town. At about 22-26 MPH on flat highway during an automatic shift, RPM and MPH needle will jump around with a stutter.
To my surprise, I didn’t feel this when I shifted to L and shifted manually.

I’ve drained and refilled the fluid with no change.She says it has happened a fair amount of times.
There is no check engine light so I’m assuming there will be no misfire codes. I checked the front three coils/plugs and they seem to be firing. Back three are harder to get to and I didn’t think it was worth my time for now. Wanted to diagnose this first.

Thoughts?
 

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There is a TSB for a 2-3rd shift issue .. Bulletin No.: 18-NA-358 . You should probably get it to the dealer to check it out while still covered.
 
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