2017 Denali torque converter/fluid problem?

[Nitrostick]

Nitrostick
I have a 2015 Yukon Denali with same problem. Dealer did the flush and software- but the vibration remains. There is a service bulletin from GMC. The dealer is going to replace the torque converter Monday under warranty. Fingers crossed

Has your vibration been confirmed to be torque converter caused? Happens when cruising under light throttle most often between 45-65mph and you can watch the tachometer jump a few hundred RPM when it occurs?

If it truly is torque converter clutch slip it seems from my research the "fix",..flush/fluid change/filter/software,...works most of the time but not all the time. Higher mileage vehicles or those that have more severe shudder the torque converter lock-up clutches may be permanently damage and the torque converter may need to be replaced.

 

[G00se]

Has your vibration been confirmed to be torque converter caused? Happens when cruising under light throttle most often between 45-65mph and you can watch the tachometer jump a few hundred RPM when it occurs?

If it truly is torque converter clutch slip it seems from my research the "fix",..flush/fluid change/filter/software,...works most of the time but not all the time. Higher mileage vehicles or those that have more severe shudder the torque converter lock-up clutches may be permanently damage and the torque converter may need to be replaced.

Exactly this. Dealer just did full flush/fluids and software upgrade and all good so far after 150 miles. I had quite a bit of vibration from 20-70mph.

 

[dapapa]

Has your vibration been confirmed to be torque converter caused? Happens when cruising under light throttle most often between 45-65mph and you can watch the tachometer jump a few hundred RPM when it occurs?

If it truly is torque converter clutch slip it seems from my research the "fix",..flush/fluid change/filter/software,...works most of the time but not all the time. Higher mileage vehicles or those that have more severe shudder the torque converter lock-up clutches may be permanently damage and the torque converter may need to be replaced.

 

[dapapa]

That’s pretty much it. Dealer replaced torque converter and the rumble vibration is gone, and transmission is less clunky at low speeds. Done under extended warranty.