That’s the best thing about the lifetime warranty. Everyone is trying to figure out when to change fluids that the manual says don’t need to be changed. If my transmission craps out, I will have followed Ram’s recommendations by not touching the damn thing and they’ll be responsible for it. If they wanted to get nasty, by changing the transmission fluid myself, at a dealership, or through another mechanic, they could rightfully void my warranty. Screw that! I’ll run it until it won’t run anymore and hope the truck’s value still outweighs the cost of a new tranny when/if that happens.