NOO a tune is worth every penny. My trans lasted a long time supercharged and me abusing the crap out of it.
My rearend blew once I got an FLT level 5 tranny. Get rid of all the torq management and you will be ok for a while but if you build lots of power then parts start breaking. All of this has been with zero trq mgmt and once it is gone you will love your truck even more.