Bad vibration at highway speeds

[Will Baribault]

Guys,

Im pulling my hair out here, when I’m on the highway at around 70 there is an intermittent vibration (feels like I’m hitting a rumble strip)  that usually lasts for 2-3 seconds and mostly occurs going up hills. The truck seems a little jerky during normal driving as well. I have already changed all my u-joints, wheel and axle bearings, 4 new tires, recent alignment. 125k miles

Edited June 7, 2023 by Will Baribault
Added info

[Brianibew]

Sounds like a torque converter issue, unfortunately.

[rav3]

I agree with Brian....sounds like torque converter. Depending on how long you've been driving it, your transmission may be toast now from the debris

[Will Baribault]

Thanks guys, I appreciate the feedback. Been driving the truck like this for around 3 weeks now, hoping for the best expecting the worst. 

[sk]

Yep torque converter.

 

I actually just got my truck back yesterday after going through the same thing.  Had a very knowledgeable shop diagnose it and determined that's what it was.  Ended up with a reman GM OEM trans put in since it comes with a warranty, but if you go this route be prepared for a hefty bill ...