 My 2016 shifts up and down whenever it feels like it. Sometimes 2 gears at a time on a flat road with the cruise on and no wind. The 6 cylinder engine is a piece of crap teamed with a 6 speed tranny which the 5th and 6th gears not being used at speeds over 75. Had mine back to the shop 4 times and they said this is how they run. Well after owning 9 previous Tacoma's that isn't how the older ones run. I hooked it up to my boat and it couldn't get out of 3rd gear with my boat behind it.  I had to turn and unhook the boat and I drove right to my dealer and demanded my 2014 Tacoma back. The 2014 pulls the same small boat perfectly. I'm 5' 11" and my head hits the sunroof constantly and I would be worried if I hit a big bump while driving the 2016. Beware and give it a nice long test drive if your interested in buying a new Tacoma, they have a ton of engine/tranny problems. Just google 2016 Tacoma shifting problems and you can read 1000's of post about unhappy owners like myself.  Oh yeah, mileage on 8 fill ups was 12.5 to 13.4, no kidding. I probably had a big lemon, but Toyota Corp. told me this is how they run so I'll leave it up to you to decide. I've read enough posts to know there's MANY others just like me out there.