I have a 94 YJ witha stock dana 35 rear axle witha 4.10 gear. I don't do really heavy off roading as of now. I would like to put in some kind of locker for added traction in mud, snow, and dirt. I'll be running 31 inch tires. Is it worth my time to install a locker in the dana 35 or should I upgrade the axle first, then instal a locker? Thanks