Automatic transmission 4-speed

I have a 2014 Tacoma with a 2.7 and a four speed auto and nobody can give me a straight answer including Toyota,, Does it come from the factory with a full Synthetic , or a blend, or what is it ,????? The dealership not really sure, but thinks it's a Synthetic It does not say so on the Toyota qt. ATF container, all it says is it meets the required Specs. I am told by the the dealership who really does not know and states it must be because you don't need to change it even if you are towing the maximum 3500lbs for 100,000 miles.....Needless to say I will be changing it sooner. If you absolutely know, I would love to know....I'm from the old school and would like to know what I'm driving around with....I don't really care who makes it for Toyota, I just want to know what it is.. Thank you We all know the required 0W-20 motor oil is a full Synthetic.. It was suggested when towing any distance i go to a more viscous oil like a 5W-30 or 10W-30

 

https://www.tacomaworld.com/threads/aisn-warner-340-series-transmissions-write-up.325531/