Since I got the truck in 2016 I'm feeling the humming like I'm driving on and off over a runmble strip. At the beginning I thought it was something on the road and then it was gone so it didn't cut my attention that much but lately it is geting worst. If I'm going downhill I don't feel it but if I'm going just driving straight and uphill that is the moment it happen. I cannot record it because it doesn't make a loud sound it's more like a humming type of vibration. Just want to know if this is a normal thing for Tacoma's or if it's something that I got to take the truck to the dealer. Thanks everyone appreciate it.