Well, the dealer could make a case that the bigger tires and even the lift affected the transmission (since all are part of the drivetrain; i.e., the lift affects the pinion angle, IIRC). Honestly, it all comes down to how they're feeling that day. Some dealers will let it slide and repair under warranty; others will be hard-asses, deny your warranty based on the modifications to the drivetrain, and then expect you to pay out of pocket.
That being said, there's a Krispy Kreme location here:
6935 South Lindbergh Blvd.
St. Louis, MO 63125
You might want to go buy a few dozen.