I have tried a few different things to try and fix this. The truck vibrates any where from 30-45mph. Mainly felt in pedal and by driver but passenger feel it slightly. The truck drives straight with no issues. I checked the front u joints they are still good were replaced past July. Ball joints, shocks, stabilizer, trac bars all replaced. Wondering what this may be since I get a lot of variable answers searching google. From torque converter to tightening a bolt.

 

Rotate your tires. See if it changes. That will at least tell you if it is the tires or not.

 

Forgot to mention it goes away as soon as 45mph is hit. Or when the pedal is released.

 

I had this problem with a separate truck, with new tires no less. I took them back to the tire shop and had them rotate and check the rims for balance and the problem persisted. They then took the rims off and pressure washed the inside bead of the rim where some mud had accumulated and the problem went away. Seriously, it was that easy and I never would have figured it out.

But, I've never had that issue with the alloy rims on my Dodge...

 

I had this problem but it was a tire that had a messed up belt in it. You couldn't tell it was messed up when the truck sat still but as soon as the tires started to rotate it was noticeable