2022 2500 6.7 8ft box

[Jslade20]

I have a shake/vibration at 37-45mph/60-70kph
I checked the driveline everything seems tight, steady bearing seems to be in good shape, they truck was purchased used with cheap tires. Any input would be great! This shake is driving me nuts. The shake also is not there under medium to hard acceleration.

 

[SolidAxleorBust]

Tires could be it. Solid front axles are VERY sensitive to tires that are out of round, or way uneven. I once had severe death wobble, and the only thing wrong was the tires. These front ends do not wear out like Dodges of the past.