16 Yukon Severe wobble at 75 +

[Borrowed_Time068]

Good morning! So in addition to a provable failed torque converter at 103k, my 2016 Yukon SLT has had a severe vibration issue which starts around 74 MPH and gets really bad over 80. I had the wheels Road Force balanced. Found a bent rim so I replaced it. Vibration still present just as bad. It’s hard to pinpoint but I suspect it may be the driveshaft. Which seems to be a common issue with the GM trucks. I’m hoping to have this diagnosed while it’s in the transmission shop. Anyone had similar issues?

 

[swathdiver]

I have 3 GMC trucks and no driveshaft issues. Road debris can damage them causing a vibration, as can worn u-joints.