vibration 55+

just recently bought a 2015 tacoma 4x4 4door sr5. noticed it has a vibration its not in the steering wheel but i can feel it in the seat i can also see the passenger seat vibrating. i took it back to the dealer they couldnt find anything wrong. the service guy asked me if this was my first tacoma i said yes he said im not the only one that complains about the issue he said all the tacomas vibrate its in the driveline some where but toyota does not know why they vibrate the truck had 11000 on it when i bought it. so is this correct or is there a solution to the vibration. thanks

 

1) welcome to tacomawrold
2) any lift on the truck?
3) he is correct, its the drive line.
4) there are many people who have this problem. its the 2 piece drive shaft that toyota used. some people lower the carrier bearing, or they add axle shims, or they add shims to the carrier bearing, there's many things that can make the vibrations better.

ill dig up a link on the subject

 

this

 

Ok thanks appreciate the feedback