This "warranty" is it through the dealer or 3rd party?
I can tell you that for the most part as long as you put a tire that is sold on a
stock new Jeep then you should be fine because unless the say some thing about OE tire in the KJ then all they are saying is an OE model/brand if that
you can get away with some things if you play the game
They say OE tire size but dont say Liberty OE tire size so if you put a 245/75 MTR from a Rubicon then you are in the clear ,as far as they know you bought them from a Jeep dealer
or you can put any 235/75 tire you want or what ever size was a stock KJ size of any style and brand and be in the slear
Now if it is 3rd party you are still not to bad off
most of them NEVER check to see what size tire you are running
even in the event of a ****** being shot most times they dont even send out a rep but only question the shop about the work so if you find the right shop then if they dont ask about tires the shop will not tell about the tires ,they can charge a premium for the work and you will not ***** about it
we have 245/75 MTR's on our KJ and when we asked the dealer about their affect on the 7/70 warranty they said
"why would the tires affect the power train warranty?"
"now the lift will affect some of the suspension parts under the 3/36 but the power train is not part of the suspension"
they think that my wife is so cool with her lifted and MTR'd KJ ,we were getting free oil changes from the dealer so why not bring it