No rowing, transmission feels fine.
Gas mileage is the same, really it’s the fact that it’s a flying brick that kills the mileage.
The lift does not void the warranty. Abuse from now fitting larger tires and doing harder trails could be sited as a contributing factors to breakage, which a dealer could use as rationale to refuse warranty work. I’m really only concerned with the motor and tranny being covered by warranty, which I doubt 34-35” tires would really affect much. These axles are bigger than D44’s, maybe somewhere between a D44 and D60 so not really a concern for me.