Your profile is blank so I don't know which motor you have but the answer either way is yes, any extra weight and turning a taller tire with or without stock gears adds a strain. Now the question is how much? I've been running taller tires for 21 years and 200,000 miles with no major work on the motor, tranny or gears, the biggest cost has been in loss of a couple MPG's. So the question is, is it worth it? To me it is absolutely!