2018 Tacoma vibrations at ~35MPh and 1500 RPM

I can't find a forum for this issue and it's been going on for a while.

When I'm driving around 35 MPH and the truck is sitting right around 1500 RPM, I have this vibration that begins in the Front driver side floorboard and almost feels like it vibrates all the way under the front seat to the back. It happens every time I drive around the specs above and I can hear the vibrations as well and it is super annoying.

Anyone with any suggestions would be much appreciated thanks.

 

Could be a number of things, I'd start with the least expensive possible cause. Wheel /tire balance, then go from there.

 

How many miles on your truck? Have you ever had the transmission fluid changed?

 

Bent or out of balance driveshaft ?

 

Truck has ~50k miles on it.

Driveshaft has never been hit or damaged before

 

As long as you are sure of that. It doesn't take much to offset the balance.