I'm wondering if those telling OP not to worry will be there to help him pay when things go sideways?? Maybe start a warranty company for those with lift kits and over-sized tires??
I'm not trying to be a **** but the people that offer warranties do have rules and there are reasons for those rules. Over-sized tires put excess strain on drive train components. Lift kits alone don't impact drive train but has anyone in the history of the world ever installed a lift without also installing over-sized tires? I'm pretty sure I've read that FCA will allow a 2" lift and one up-size in tires (whatever that means?) without voiding warranty coverage. Engineers design these trucks and the manufacturers offer warranties based on this design.
Again man ... comprehension is key here lol ... the lift kit "DOES NOT" void the warranty on the drive train ...yes you will obviously add bigger tires with a lift kit but if people are smart enough they will play the game as well too ... I have taken off lift kits from trucks and so have friends so that they can be fixed under warranty before they are taken to the dealerships ...
And again ... there are quite a few lift kit companies that offer warranty for those things that the dealership will not cover ....
And no you are not being a **** .... but understand the language of how things are written in a contract ... loop holes everywhere especially in the favor of dealerships but if you are smart enough even with your lift kit on you can still get service for most things ... I mean come on are you really going to hold the dealership responsible for your drivetrain going out when you know that you have over sized tires with less than optimal gears on your truck ? lol ....
So keep that in mind .... you lift the truck then yes there is the possibility that any dealership can void you refuse to fix what was mentioned ..... but everything else is going to be covered ...